Abstract: Circuits and operating methods thereof for correcting phase errors introduced by amplifiers employing gallium nitride (GaN) transistors are described. The phase errors are caused by trapping effects exhibited by the GaN transistors. The circuits described herein pre-distort the phase of the input signal to compensate for the phase error introduced by the amplifier. Thereby, the phase of the output signal of the amplifier has a reduced phase error. For example, the output signal may have a near zero (or zero) phase error.

Abstract: A secure remote actuation system may comprise a remote input receptor and a central signal switch. The remote input receptor may comprise a user interface for receiving user inputs from a user. The central signal switch may comprise acceptable inputs. The central signal switch may further comprise a microcontroller for obtaining and comparing the user inputs to the acceptable inputs. In the present invention, the microcontroller obtains the user inputs from the remote input receptor while the user is using the user interface.

Abstract: A method of communicating in a wireless system includes receiving resource scheduling information indicating a location of a resource for transmitting a packet, an indication of a target power level, and an indication of a first bandwidth, receiving an indication of a first transmission power level, determining a second transmission power level in accordance with the target power level, and at least one of the first bandwidth and the first transmission power level, and transmitting the packet at the location of the resource with the second transmission power level.

Abstract: The described embodiments transfer an activity from a source electronic device to a companion electronic device. The source electronic device receives activity information describing an activity performed in a first application at the source electronic device, determines an activity identifier for the activity information, and broadcasts an activity advertisement comprising the activity identifier. Upon receiving the activity advertisement, the companion electronic device determines whether a second application that is associated with the first application is available at the companion electronic device. Then, the companion electronic device configures the second application and commences performing the activity with the second application at the companion electronic device.

Abstract: Disclosed is a Radio Frequency (“RF”) Energy Harvesting System (“RFHS”). The RFHS includes a phased array antenna, a power harvesting unit, and a controller. The phased array antenna is configured to receive ambient RF energy and, in response, produce an input power signal. The power harvesting unit is in signal communication with the phased array antenna and includes a rectifier module, storage module, and power threshold module. The power harvesting unit is configured to receive the input power signal and, in response, produce a rectified power signal. The controller is in signal communication with the phased array antenna and may steer the antenna beam of the phased array antenna.

Abstract: Provided is a communication unit that includes first and second power-amplification modules, which can be integrated. The first power-amplification module includes a first power-amplifier for a first frequency band in a first communication scheme, a second power-amplifier for a second frequency band in the first communication scheme, a third power-amplifier for a third frequency band in a second communication scheme, a fourth power-amplifier for a fourth frequency band in the second communication scheme, a first bias circuit that generates a first bias current to the first and second power-amplifiers, and a bias current circuit that converts the first bias current into a second bias current to the third and fourth power-amplifiers. The second power-amplification module includes a fifth power-amplifier for a fifth frequency band in the first communication scheme, and a second bias circuit that generates a third bias current to the fifth power-amplifier.

Abstract: An electronic device comprising a first power switch connectable or connected between a first voltage source and a load is proposed. The first power switch assumes a conductive state in response to a power-on request and a non-conductive state in response to a power-off request, for energizing and deenergizing the load, so that a voltage across the first power switch tends to a positive high level when the first power switch is in the non-conductive state and to a positive low level when the first power switch is in the conductive state. The device further comprises a second power switch connectable or connected between a second voltage source and the load. The second power switch assumes a conductive state in response to the power-on request and a non-conductive state when the voltage across the first power switch is below a defined switch-off threshold lower than the high level. The second voltage source thus assists the first voltage source in powering up the load.

Abstract: An amplifier architecture can include an input circuit for splitting a signal into first and second portions, and carrier and peaking amplification paths for receiving the first and second portions. The architecture can further include an output circuit having a balun transformer circuit with first and second coils, with the first coil between first and second ports, the second coil between third and fourth ports, the first and third ports coupled by a first capacitance, and the second and fourth ports coupled by a second capacitance. The first port can receive a first signal from the carrier amplification path, and the fourth port can receive a second signal from the peaking amplification path. The second port can provide a combination of the first signal and the second signal as an amplified signal. A termination circuit can be provided to couple the third port to a ground.

Abstract: The present invention provides a network optimization system, device, and method, including: determining, by a radio resource management functional entity, radio resource statistical data that is based on a TTI time granularity, acquiring radio resource configuration information, and managing a radio resource of a cell in which the radio resource management functional entity is located; determining, by a distributed optimization functional entity, first time granularity data and a first key performance index (KPI), determining first reference configuration information, determining a first optimization plan according to the first statistical data and the first reference configuration information, and optimizing the first KPI; and determining, by a centralized optimization functional entity, second statistical data that is based on a second time granularity, and a second KPI, determining second reference configuration information, determining, according to the second statistical data and the second reference co

Abstract: The present disclosure provides an amplifier for vehicle, vehicle including the amplifier, and method for controlling the amplifier for vehicle, which uses a 48 volt (V) battery voltage and adjusts speaker output according to variable audio signals, thereby minimizing the size of the amplifier, reducing conversion loss of a Direct Current (DC)-to-DC converter, and increasing output efficiency. In accordance with one aspect of the present disclosure, An amplifier for vehicle includes a first input port for receiving a first voltage; a second input port for receiving a second voltage lower than the first voltage; at least one power Integrated Chip (power IC) connected to a speaker for using a voltage received from the first input port; and a controller for controlling the power IC using a voltage received from the second input port.

Abstract: A radio base station providing a service to a radio terminal by using plural component carriers includes a scheduler preferentially allocating, to the radio terminal, one of the component carriers that has a transmission power dynamic range whose lower limit value is lower than lower limit values of transmission power dynamic ranges of a rest of the component carriers; and a transmitter transmitting a radio signal to the radio terminal by using the allocated component carrier.

Abstract: The objective is to find the amount of ambient RF energy available in a given location to power battery free products. This was achieved by designing and building a novel, handheld, low cost, system to capture the ambient RF signal (such as cellular signals, TV broadcasting waves, and WiFi signals), convert to DC power level that can be harvested at any given location, and visually GeoMap it using the GPS coordinates. The constructed hardware portion of the system consists of the Arduino microcontroller, the RF Power Detector chip, wideband antenna, and Bluetooth Module. The Arduino is programmed to capture the RF Power data from the RF Power Detector chip and send it to the Mobile Application. The developed Android App is able to communicate with the Arduino via Bluetooth and receive the captured RF Power data from it. The data is uploaded to the web server along with GPS coordinates. The created website stores the uploaded data from the app to the online database.

Abstract: Embodiments of the disclosure relate to reducing power consumption in a remote unit of a wireless distribution system (WDS) for intermodulation product suppression. Intermodulation products generated by a power amplifier circuit can leak from a downlink signal path into an uplink signal path to degrade sensitivity of the uplink signal path in a remote unit. In this regard, the remote unit is configured to measure a power of the leaked intermodulation products and enables a selected number of power amplifiers in the power amplifier circuit for reducing the measured power of the leaked intermodulation products to a predetermined threshold. By enabling only the selected number of power amplifiers based on the measured power of the leaked intermodulation products, it is possible to avoid enabling an excessive number of power amplifiers in the power amplifier circuit, thus helping to reduce power consumption for intermodulation product suppression.

Abstract: An apparatus includes a first predistorter configured to calculate a first predistortion parameter and configured to distort an input signal using the first predistortion parameter to output a first distortion signal, a second predistorter configured to calculate a second predistortion parameter and configured to distort the first distortion signal using the second predistortion parameter to output a second distortion signal, a power supply configured to receive the first distortion signal to generate a first envelope signal, and configured to limit a bandwidth of the first envelope signal to obtain a second envelope signal to supply a source voltage, and a power amplifier configured to receive the source voltage and to output an output signal obtained by amplifying the second distortion signal.

Abstract: A power supply for a radio frequency (RF) power amplifier that amplifies an RF input signal into an RF output signal and a method of operation in the power supply. The power supply comprises a first power converter to convert an input voltage to the power supply into a first supply voltage of the RF power amplifier. The power supply comprises a second power converter to receive the input voltage and the first supply voltage and to selectively convert either the input voltage or the first supply voltage into at least a portion of a second supply voltage of the RF power amplifier.

Abstract: A boundary of a wireless network is monitored for incoming wireless signals that may interfere with an ability of a first wireless computing device to connect to the wireless network within the boundary of the wireless network. For an incoming wireless signal determined to interfere with the ability of the first wireless computing device to connect to the wireless network within the boundary of the wireless network, a directional opposing outgoing wireless signal is emitted to counteract the incoming wireless signal and to stop the incoming wireless signal from further interfering with the ability of the first wireless computing device to connect to the wireless network within the boundary of the wireless network.

Abstract: A control unit for controlling wireless data transmissions in a mobile communications system provided on board an aircraft, a mobile communications system having a control unit of this type, an associated method for controlling wireless data transmissions in a mobile communications system provided on board an aircraft, and a computer program for carrying out the method. The control unit comprises a generating component for generating a band-limited masking signal for masking terrestrial mobile communications signals in a first frequency band and a combining component for combining the band-limited masking signal and a service signal for the wireless transmission of data in a second frequency band different from the first frequency band. The combining component is configured to combine the masking signal and the service signal so that terrestrial mobile communications signals in a third frequency band formed by overlapping of the first and the second frequency band are masked.

Abstract: Key performance indicators for self-organizing networks are dynamically updated and/or selected. A method includes evaluating a network condition, ranking key performance indicators (KPIs) based on the network condition resulting in ranking information, and determining weights of executing sets of instructions. The determining is based on the ranking and an association between the executing sets of instructions and the KPIs associated with the ranking information. Another method includes evaluating a network condition, and changing a value of a target of a KPI from a first value to a second value based on a change in the network condition from a first network condition to a second network condition. Another method includes evaluating a network condition, determining weighting factors for respective KPIs, wherein the weighting factors are based on evaluation of the network condition, and generating composite KPI information based, at least, on applying the weighting factors to the respective KPIs.

Abstract: An operating method of an electronic device is provided. The method includes selecting a file generated by the electronic device or received from another electronic device and transmitting file information based on the file to a memory device through short range communication.

Abstract: A data storage device includes a central processing unit (CPU); a peripheral device; a power management unit (PMU) configured to control a power supply to the CPU and the peripheral device; and a receiver configured to transmit a second signal to the PMU through a second transmission path after transmitting a first signal to the CPU through a first transmission path, the receiver being configured such that the first and second signals transmitted by the receiver are signals that were output from a host.

Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.

Abstract: A transmission power management device including: a memory, and a processor coupled to the memory and configured to: acquire a first path loss between a first relay station and a second relay station, the first relay station relaying a first signal, the second relay station relaying a second signal, and adjust a first transmission power of the first signal by the first relay station based on the first path loss.

Abstract: Technology for a signal booster is disclosed. The signal booster can include a first antenna configured to communicate signals with a wireless device. The signal booster can include a second antenna configured to communicate signals with a base station. The signal booster can include a signal amplifier configured to amplify and filter signals for communication to the base station via the first antenna or for communication to the wireless device via the second antenna. The first antenna can be configured to be coupled to the second antenna to form a bypass signal path that bypasses the signal amplifier.

Abstract: A mobile station for use in a wireless network that operates according to the Long-Term Evolution Advanced (LTE-A) standard. The mobile station is operable to transmit an aperiodic sounding reference signal (SRS) to a base station in response to a triggering grant received from the base station. The bandwidth on which the mobile station transmits the aperiodic SRS depends on a type of the triggering grant. The type of the triggering grant is one of a downlink grant, an uplink multiple-input, multiple-output (MIMO) grant, and an uplink single-input, multiple-output (SIMO) grant.

Abstract: An active circuit control system that utilizes multiple PWM signals to activate and power an array of active components, requiring minimal wiring between the multi-mode signal conditioner and active components. Signal conditioning and filtering is implemented to allow transmission of power and control signals for multiple components over a single or multiple transmission lines. The circuit can be used to provide supply voltage and control signals for active antennas, switch networks, and other components in communication systems and electronic devices.

Abstract: A payment object reader configured to read data from NFC or EMV enabled payment objects. The payment device includes a NFC antenna, a boost converter (voltage regulator) chip. A first feedback circuit is connected to the NFC antenna and the feedback pin of the boost converter chip. The boost converter chip regulates a first voltage provided to the NFC antenna for the NFC antenna to modulate a field. A second feedback circuit includes a microcontroller with an ADC input and a DAC output. ADC input is connected to NFC antenna, and DAC is connected to the feedback pin of the boost converter chip. The microcontroller receives the voltage at the ADC input and controls the DAC output to transition based on the value of the ADC input.

Abstract: A mobile data storage device is configured in the manner of a data storage card, or a data storage stick. The mobile data storage device can include at least one electrical coil (7), and energy storage (6), a data storage (1), at least one interface unit (3), and at least one permanent magnet (8). The at least one interface unit (3) is configured for the output or the receiving of data that is stored, or that can be stored, in the data storage (1). The energy storage (6) can be inductively charged by a magnetic alternating field, which can be generated by displacing the at least one permanent magnet (8) in a region of the electrical coil (7). At least one of the at least one interface unit (3) is electrically coupled to the energy storage for the energy supply thereof.

Abstract: The present invention relates to a method for compensating a power amplification unit of a wireless RF module that includes a baseband unit, a RF transceiver unit, a power amplification unit and a control unit. The baseband unit is connected to the power amplification unit through the control unit and the RF transceiver unit. Based on the characteristic of the power amplification unit, the baseband unit provides a control signal to regulate the output signal characteristic of the power amplification unit, or provides a RF transceiver unit control signal to regulate the characteristics of the RF signal being transmitted by the RF transceiver unit to the power amplification unit, or to regulate the characteristics of the baseband signal being transmitted to the RF transceiver unit, enabling the characteristics of the output signal of the power amplification unit to meet the specifications of the related system.

Abstract: Systems and methods are disclosed that facilitate creating antenna ports to correspond to two or more groups of user equipment. The systems and methods can organize two or more groups of user equipment and signal to each of the two or more groups a respective antenna port. The systems and methods can further communicate mapping information, a reference signal, or delay related to a linear combination in order to identify antenna ports. Based on such communicated information, the reference signal can be decoded in order to identify each antenna port.

Abstract: The present invention provides a network optimization system, device, and method, including: determining, by a radio resource management functional entity, radio resource statistical data that is based on a TTI time granularity, acquiring radio resource configuration information, and managing a radio resource of a cell in which the radio resource management functional entity is located; determining, by a distributed optimization functional entity, first time granularity data and a first key performance index KPI, determining first reference configuration information, determining a first optimization plan according to the first statistical data and the first reference configuration information, and optimizing the first KPI; and determining, by a centralized optimization functional entity, second statistical data that is based on a second time granularity, and a second KPI, determining second reference configuration information, determining, according to the second statistical data and the second reference conf

Abstract: A power amplifier of an envelope tracking system is configured to generate an output power with a variable supply voltage that is generated in an envelope tracking path. A signal generation/processing path receives an input signal and processes the input signal to the power amplifier in a main signal processing path. A delay component is configured to generate a delay to the envelope tracking path with respect to the signal generation path. A feedback path is configured to generate a feedback signal from the output of the power amplifier and adjust the delay component or the delay of the delay component during an active transmission or an active transmission mode.

Abstract: A method for data transmission, between measuring apparatuses (5) and a data processing device (3, 3?) in a measured data recording system (1, 1?) with a controller (7, 7?), includes repeated execution of exchange steps by the controller. The exchange steps include reception of analog measured signals from the measuring apparatuses (5) and/or the digital exchange of digital messages between the measuring apparatuses and the controller (7, 7?). The exchange steps are started with a predefined time lag. A digital data packet is sent by the data processing device (3, 3?) to the controller. The digital data packet contains the code of one of the plurality of measuring apparatuses (5) and a digital message. The controller extracts the code from the digital data packet by the controller (7, 7?) and sends the digital message to the one of the plurality of measuring apparatuses, after the completion of the digital exchange.

Abstract: A method of operating an electronic device is provided. The method includes determining whether a specific event has occurred, when the specific event has occurred, determining whether a battery level is less than a set level, and when the battery level is less than the set level, changing a path of an electric current introduced from a power supply from a first path to a second path.

Abstract: The present invention discloses a method and an apparatus for determining a power offset parameter. The method for determining the power offset parameter provided in the present invention comprises: obtaining data throughput rate and/or cell resource usage state of a terminal; determining a resource state of the terminal according to the data throughput rate and/or the cell resource usage state and a corresponding threshold; determining power offset parameter configuration corresponding to the resource state according to the determined resource state; and sending the power offset parameter configuration to the terminal, so that the terminal determines the power offset parameter according to the power offset parameter configuration.

Abstract: A method for power control and a user equipment, UE, determine a current power control mode of the UE based on an adjustment trend of the UE with respect to signal transmission power of a base station, and a variation trend of the received signal quality. A target value of the received signal quality of inner-loop power control is reset after the power control mode of the UE tends to normal, so as to return the transmission power of the base station to the UE to a normal level as soon as possible, thereby to inhibit adverse influences caused by the windup effect.

Abstract: A monolithic integrated circuit (IC), and method of manufacturing same, that includes all RF front end or transceiver elements for a portable communication device, including a power amplifier (PA), a matching, coupling and filtering network, and an antenna switch to couple the conditioned PA signal to an antenna. An output signal sensor senses at least a voltage amplitude of the signal switched by the antenna switch, and signals a PA control circuit to limit PA output power in response to excessive values of sensed output. Stacks of multiple FETs in series to operate as a switching device may be used for implementation of the RF front end, and the method and apparatus of such stacks are claimed as subcombinations. An iClass PA architecture is described that dissipatively terminates unwanted harmonics of the PA output signal.

Abstract: A method for adjusting transmission power of a terminal includes: acquiring a distance between a human body and the terminal; retrieving, from a prestored table indicative of correspondence between distances and power adjustment values, a power adjustment value corresponding to the distance between the human body and the terminal; and adjusting transmission power of the terminal based on the power adjustment value. According to the method for adjusting transmission power of the terminal provided by the disclosure, antenna power output by the terminal is adjusted in real time according to the current distance between the human body and the terminal.

Abstract: A radio frequency (RF) power amplifier comprises an output stage amplifying circuit and a counterpart waveform generator. The output stage amplifying circuit receives a first waveform through an input node and amplifies the first waveform so as to output an amplified waveform through an output node. The counterpart waveform generator generates a second waveform corresponding to a portion of frequency components of the first waveform. The output stage amplifying circuit and the counterpart waveform generator are electrically coupled such that the second waveform is applied to the input node of the output stage amplifying circuit to substantially compensate the portion of frequency components of the first waveform.

Abstract: A distributed power amplifier circuit is disclosed. The distributed power amplifier circuit comprises an amplifier arrangement comprising a plurality of sub amplifiers, each having an output port for outputting an output signal of the sub-amplifier and an output combiner network for combining the output signals from the sub amplifiers. The output combiner network includes, for each sub amplifier, an associated auto transformer operatively connected to the output port of the sub amplifier for receiving the output signal of the sub amplifier. The auto transformers each have a first interconnection terminal and a second interconnection terminal. The auto transformers are operatively connected in series via the interconnection terminals, thereby forming a chain of auto transformers having a first end and a second end, wherein the first end is arranged to be connected to an antenna.

Abstract: Methods and apparatus are provided for a User Equipment (UE) configured by a Master enhanced NodeB (MeNB) for operation with dual connectivity to a Secondary eNB (SeNB) to transmit acknowledgement information when the UE is power limited and for a respective eNB to determine a UE power limitation. Methods and apparatus are also provided for the UE, the MeNB, and the SeNB to adjust operation according to a partitioning of a UE capability between the MeNB and the SeNB. The UE capability can be a transmission power, a soft buffer size, a reception or a transmission of a number of data transport block bits, or a number of decoding operations.

Abstract: Mobile devices such as mobile phones include amplifiers for example audio and RF amplifiers which may consume a significant amount of the available power supplied by a battery. An amplifying system 100 for a mobile device is described the amplifying system comprising a current monitor 12 arranged between a first supply node and a second supply node and operable to monitor a current flow between the first and second supply nodes and to output a monitored current value; a peak current limiter 14 configured to limit an amplifier current to an amplifier to not exceed a maximum peak current value and coupled to a one of the first supply node and the second supply node; a controller coupled to the current monitor output and configured to control the peak current limiter. The amplifying system can dynamically manage the peak current available to the amplifier dependent on the load current being supplied by a battery.

Abstract: A system includes a crest-factor reduction circuit, a signal analyzer, and a pre-distortion circuit. The crest-factor reduction circuit reduces a crest factor of a baseband signal and generates a feedforward signal. The signal analyzer generates parameters based on the feedforward signal and an output signal from a power amplifier. The pre-distortion circuit generates a pre-distorted baseband signal based on the parameters for input to the power amplifier.

Abstract: Aspects of a method and system for sharing modulation information between multiple access points may include receiving modulation control information and demodulation control information at an access point comprising one or more receivers and one or more transmitters. One or more modulation frequencies may be adjusted and utilized to generate transmit signals by the one or more transmitters based on the received modulation control information. One or more demodulation frequencies may be adjusted and utilized to generate intermediate frequency signals by the one or more receivers based on the received demodulation control information. The modulation control information and the demodulation control information may be received via a control point. The modulation control information and demodulation control information may be received on a link operating in a frequency band different from said transmit frequencies and said receive frequencies.

Abstract: Apparatus and methods for envelope tracking are disclosed. In one embodiment, a power amplifier system including a power amplifier and an envelope tracker is provided. The power amplifier is configured to amplify a radio frequency (RF) signal, and the envelope tracker is configured to control a supply voltage of the power amplifier using an envelope of the RF signal. The envelope tracker includes a buck converter for generating a buck voltage from a battery voltage and a digital-to-analog conversion (DAC) module for adjusting the buck voltage based on the envelope of the RF signal to generate the supply voltage for the power amplifier.

Abstract: A communication apparatus generates a first wireless communication network and transmits/receives information via the first wireless communication network. The communication apparatus generates a second wireless communication network different from the first access point and transmits/receives information via the second wireless communication network. The communication apparatus controls to change a function available by using a predetermined application in accordance with the first or second wireless network via which an external device establishing communication is connected.

Abstract: A method is provided for controlling transmission powers by a communication apparatus in a wireless communication system supporting a plurality of component carriers. When a sounding reference symbol (SRS) transmission overlaps with a physical uplink control channel (PUCCH) transmission in a time domain, the communication apparatus checks as to whether a total of a PUCCH transmission power for the PUCCH transmission on a first component carrier and a SRS transmission power for the SRS transmission on a second component carrier exceeds a maximum transmission power configured for the communication apparatus. The SRS transmission is dropped by the communication apparatus if the total of the PUCCH transmission power and the SRS transmission power exceeds the maximum transmission power configured for the communication apparatus.

Abstract: A mobile communication system capable of reducing energy consumption of a network node in a local area range. When judging that there is a shift trigger, a local eNB shifts from a normal operation to an energy saving operation. In the energy saving operation, the local eNB stops the operation of transmitting at least a part of downlink transmission signals to be transmitted to a user equipment (UE) and performs the operation of receiving an uplink transmission signal transmitted from the UE. When judging that it has received the uplink transmission signal (RACH) in the energy saving operation, the local eNB shifts to the normal operation.

Abstract: Described in embodiments herein are techniques for placing a secure digital input output (SDIO) device in a sleep mode and waking up the SDIO device from the sleep mode. In accordance with an embodiment, a method of controlling the SDIO device comprising: writing a control value into a register of the SDIO device; allowing the SDIO device to switch to a first operation mode based on the control value written into the register; sending a first signal to the SDIO device through a first data terminal of the SDIO device; and allowing the SDIO device to switch to a second operation mode based on the first signal.

Abstract: A method for saving energy for a wireless sensor network is provided, comprising: introducing a high energy device; defining a sensor node within a coverage of the high energy device as a source node or a forwarding node by the high energy device based on a routing relationship; sending sensed data to the high energy device by the source node at any time; and selecting a forwarding node at a working time to forward the data by the high energy device while making the other forwarding nodes at a dormancy time.

Abstract: Provided is a terrestrial broadcast wave reception-use antenna device having performance that is equivalent to or better than that of a conventional device in frequency bands at or below an FM band even if an antenna element length is shortened to approximately 55 [mm]. An amplifier (12-A) is configured so as to include a compound semiconductor HEMT for amplifying a received wave having a frequency at or below a resonant point of an antenna element (10) among received waves of the antenna element (10), the compound semiconductor HEMT having an equivalent noise resistance of 2 [?] or smaller for the received frequency so that a noise figure (NF) is approximately constant over a wide frequency band at or below the FM band.