Abstract: The present disclosure provides a voltage controlled oscillation device and a wireless transceiver. The voltage controlled oscillation device includes a resonator, an oscillation core circuit, a switch circuit and a control device. The oscillation core circuit is configured to provide signals of different phases to the resonator. The resonator is configured to generate a plurality of different resonance frequencies. The control device is configured to control the connection/disconnection among ends of the resonator through controlling the switch circuit to be on/off, so that the resonator retains two resonance frequencies from the plurality of different resonance frequencies. The control device is further configured to change the retained two resonance frequencies by controlling the switch circuit to be turn on/off. The resonator is further configured to process two resonance frequencies under action of oscillation core circuit, and output a fundamental signal of one resonance frequency.

Abstract: The present invention discloses a dual-polarized wide-stopband filtering antenna and a communications device, the antenna comprising a dielectric substrate, a metal ground plate, a metal radiating patch, metal feeding arms, a metal square ring stub, metal transverse stubs, and metal probes, wherein the dielectric substrate is a rectangular cavity structure, the metal ground plate is disposed on the bottom surface of the dielectric substrate, and the metal radiating patch is disposed in the middle of the top surface of the dielectric substrate; the metal transverse stubs and the metal square ring stub are located inside the rectangular cavity and are connected on the same layer; the metal feeding arms are located between the metal square ring stub and the metal radiating patch; one end of the metal probe and a circular hole disposed on the metal ground plate form a coaxial feeding structure, and the other end of the metal probe is linked with the midpoint of the metal transverse stub and it is simultaneously c

Abstract: A quadrature voltage-controlled oscillator circuit with phase shift includes two voltage-controlled oscillators with the same structure, wherein the two voltage-controlled oscillators are connected to each other through input and output ports, and the two voltage-controlled oscillators respectively include a cross-coupled oscillating circuit, an injection locking circuit, a resonant circuit and a voltage-controlled current source circuit which are electrically connected to each other; and signals are injected through the injection locking circuit and coupled with the oscillating circuit, so as to output a quadrature signal. An oscillator is enabled to operate stably in one mode by means of a simple circuit structure, and a good phase shift can be provided for the resonant circuit in a lower frequency band; and meanwhile, a tuning range of the oscillator is improved without increasing phase noise.

Abstract: The invention discloses a broadband dual-polarization filtering base station antenna unit, a base station antenna array and a communication device, the antenna unit comprising four dipole arms, four parasitic branches and a feed structure, wherein two of the dipole arms are arranged oppositely, the other two dipoles are also arranged oppositely, the four dipole arms correspond to the four parasitic branches respectively, each dipole arm is coupled to a corresponding parasitic branch, the feed structure is connected with the four dipole arms; the antenna array comprising at least two antenna units described above; the communication device comprising the antenna unit described above, or comprising the antenna array described above.

Abstract: A quadrature voltage-controlled oscillator circuit with phase shift includes two voltage-controlled oscillators with the same structure, wherein the two voltage-controlled oscillators are connected to each other through input and output ports, and the two voltage-controlled oscillators respectively include a cross-coupled oscillating circuit, an injection locking circuit, a resonant circuit and a voltage-controlled current source circuit which are electrically connected to each other; and signals are injected through the injection locking circuit and coupled with the oscillating circuit, so as to output a quadrature signal. An oscillator is enabled to operate stably in one mode by means of a simple circuit structure, and a good phase shift can be provided for the resonant circuit in a lower frequency band; and meanwhile, a tuning range of the oscillator is improved without increasing phase noise.

Abstract: A millimeter wave filtering antenna and a wireless communication device are disclosed. The millimeter wave filtering antenna includes a parasitic unit, a feeding unit and a feeding network. The parasitic unit includes at least one quadrilateral parasitic patch and at least one cross shaped parasitic patch, both of which are nested and combined with each other. The feeding unit includes a feeding patch, and the feeding patch is loaded with a short-circuit patch to form coupling. The feeding network feeds the feeding unit. The wireless communication device includes a millimeter wave filtering antenna according to the present disclosure. The radiation performance of the antenna can not only realize the filtering characteristics with high roll-off and high isolation, but also ensure that no additional insertion loss is introduced.

Abstract: Systems and methods which provide low-loss dielectric microstrip line (DML) circuits for use with respect to signals in the terahertz frequency range are described. Low-loss DML integrated circuits of embodiments, such as may comprise DML transmission lines, DML couplers, DML crossovers, etc., may be based on silicon technology and are adapted for signal frequencies in the range of 750-925 GHz. A DML circuit implementation may be comprised of silicon on insulator based DML structure having a silicon dioxide (SiO2) insulation layer as the middle layer of the DML, wherein the device layer (HR—Si) and the handle layer (HR—Si) are the top and bottom layers of the DML. A high-precision fabrication process for the SOI wafer, wherein the height of the dielectric microstrip lines can be accurately controlled, may be utilized to fabricate DML circuits of embodiments. A non-contact measurement technology may be used to test the DML circuits of embodiments.

Abstract: A wide bandpass filtering power amplifier using discriminating coupling is disclosed, which comprises a DC bias circuit, an input impedance matching circuit, a transistor and an output impedance matching circuit. The DC bias circuit is connected to the input impedance matching circuit which is further connected to the transistor, and the transistor is further connected to the output impedance matching circuit which comprises a tuning microstrip line and a bandpass filter. The complexity and the area of the impedance matching circuit in the power amplifier are effectively reduced. At the same time, the filtering PA has good frequency selectivity by using the discriminating coupling BPF. Meanwhile the work efficiency and bandwidth of the filtering power amplifier are effectively improved by taking both of the extended continuous mode theory and filter synthesis theory into account.

Abstract: A wide bandpass filtering power amplifier using discriminating coupling is disclosed, which comprises a DC bias circuit, an input impedance matching circuit, a transistor and an output impedance matching circuit. The DC bias circuit is connected to the input impedance matching circuit which is further connected to the transistor, and the transistor is further connected to the output impedance matching circuit which comprises a tuning microstrip line and a bandpass filter. The complexity and the area of the impedance matching circuit in the power amplifier are effectively reduced. At the same time, the filtering PA has good frequency selectivity by using the discriminating coupling BPF. Meanwhile the work efficiency and bandwidth of the filtering power amplifier are effectively improved by taking both of the extended continuous mode theory and filter synthesis theory into account.

Abstract: Systems and methods which provide an antenna in a chip-and-package distributed configuration as disclosed. Chip-and-package distributed antenna configurations of embodiments comprise an on-chip integrated circuit component and an in-package component. For example, embodiments of a chip-and-package distributed antenna comprise an exciting element on chip (i.e., formed as an integrated component in an integrated circuit die) and a primary radiator in package (i.e., disposed within an package while being external to the integrated circuit die). The on-chip exciting element may be configured to excite electromagnetic waves and to provide relatively wide bandwidth operation while occupying a relatively small area of the die. The in-package primary radiator may be configured to leverage the relatively large space in the integrated circuit product package to enhance the gain and/or configure the radiation pattern of RF signals with respect to the exciting element.

Abstract: Systems and methods which provide oscillator configurations implementing phase rotation (rotated-phase-tuning (RPT)) are described. Embodiments of a RPT oscillator may employ phase interpolation, whereby two current vectors having different phases are superimposed to provide a resultant current vector having a tunable phase to vary a phase shift in a feedback loop of an oscillator circuit and correspondingly tune the oscillation frequency. Phase rotation provided by an RPT oscillator configuration of embodiments inserts a negative phase shift (rotation phase shift) into each of two current branches to rotate the phase shifts of a phase-tuning technique, such as for avoiding phase ambiguity with respect to tunable oscillation frequencies. RPT oscillators of embodiments are varactor-less and are particularly well suited for operation to provide output frequencies in the millimeter-wave (mmW) band.

Abstract: A patch antenna is disclosed as including a rectangular patch and a rectangular ground plane parallel to and spaced apart from the patch by a sheet of dielectric material. The patch has a first longer side and a second longer side which are opposite to each other and a first shorter side and a second shorter side which are opposite to each other. A first row of vias is provided adjacent the first longer side of the patch, a second row of vias being provided adjacent the second longer side of the patch, a third row of vias being provided adjacent the first shorter side of the patch, and a fourth row of vias being provided adjacent the second shorter side of the patch. Each via extends through the patch, the sheet of dielectric material and the ground plane to short the antenna.

Abstract: An apparatus and a method for electromagnetic signal transition, comprising the steps of receiving an electromagnetic signal having a first physical characteristic arranged to be compatible for the electromagnetic signal to be transmitted on a transmission structure, and transmitting the electromagnetic signal to a substrate integrated waveguide, wherein during the transmission of the electromagnetic signal to the substrate integrated waveguide, the first physical characteristic is converted to a second physical characteristic arranged to be compatible for the electromagnetic signal to be transmitted on the substrate integrated waveguide.

Abstract: An antenna (e.g., circularly polarized (CP) planar aperture antenna) is presented herein. An antenna can include an opening cavity and a patch section within a perimeter of the opening cavity. The patch section can have crossed patch in a windmill shape. The opening cavity can have a windmill shape. The patch section can be fed differentially via grounded co-planar waveguide (GCPW). The antenna can be formed in a single layer substrate and can be 180° rotationally symmetric about its center. A height of the opening cavity can be quarter-wavelength at operating frequency and a diameter of the opening cavity can be larger than one wavelength at operating frequency.

Abstract: Systems and methods which provide oscillator configurations implementing phase rotation (rotated-phase-tuning (RPT)) are described. Embodiments of a RPT oscillator may employ phase interpolation, whereby two current vectors having different phases are superimposed to provide a resultant current vector having a tunable phase to vary a phase shift in a feedback loop of an oscillator circuit and correspondingly tune the oscillation frequency. Phase rotation provided by an RPT oscillator configuration of embodiments inserts a negative phase shift (rotation phase shift) into each of two current branches to rotate the phase shifts of a phase-tuning technique, such as for avoiding phase ambiguity with respect to tunable oscillation frequencies. RPT oscillators of embodiments are varactor-less and are particularly well suited for operation to provide output frequencies in the millimeter-wave (mmW) band.

Abstract: Systems and methods which provide an antenna in a chip-and-package distributed configuration as disclosed. Chip-and-package distributed antenna configurations of embodiments comprise an on-chip integrated circuit component and an in-package component. For example, embodiments of a chip-and-package distributed antenna comprise an exciting element on chip (i.e., formed as an integrated component in an integrated circuit die) and a primary radiator in package (i.e., disposed within an package while being external to the integrated circuit die). The on-chip exciting element may be configured to excite electromagnetic waves and to provide relatively wide bandwidth operation while occupying a relatively small area of the die. The in-package primary radiator may be configured to leverage the relatively large space in the integrated circuit product package to enhance the gain and/or configure the radiation pattern of RF signals with respect to the exciting element.

Abstract: A planar differential aperture antenna that has a high gain and wide bandwidth at a millimeter wave band is provided. The differential aperture antenna has a cavity within it that has a height of roughly a quarter of a wavelength of the desired transmission band. The cavity is H-shaped, and has a cross shaped patch within the cavity that is fed differentially by two grounded coplanar waveguides. Two ends of the patch extend towards the ports on either side of the differential aperture antenna, and the other two ends of the patch extend into the cavity lobes, perpendicular with respect to the ports.

Abstract: A system for controlling a multi-element antenna array comprising a plurality of elements each arranged to receive a signal from a signal source, wherein each of the plurality of elements includes a frequency locking module arranged to lock the frequency of the signal received by each of the elements, and, a phase control module being in communication with each of the frequency locking modules to control the phase of the signal received by each of the elements.

Abstract: Systems and methods which provide injection-locked circuit configurations for radiating signals in the terahertz frequency range with improved phase noise and signal output power are described. Embodiments of the invention provide an injection-locked terahertz radiator system comprising a half-quadrature voltage controlled oscillator (HQVCO), a plurality of injection-locked frequency quadruplers (ILFQs), and antenna elements. In operation according to embodiments, injection-locking provided by the ILFQs may be utilized to facilitate individual optimization of the output power and the phase noise. Intrinsic-delay compensation and harmonic boosting techniques may be utilized in configurations of the foregoing injection-locked terahertz radiator system to optimize the phase noise of the HQVCO and the output power of the ILFQs, respectively.

Abstract: Amplifiers can be used for a variety of electronic-based applications. Therefore, amplifier performance is of importance. A low noise amplifier can be interfaced after an antenna or a band-select filter as a first active stage, in a receiver since its bandwidth characteristics can be closely related to a system data rate. A bandwidth enhancement technique can be leverage for low noise amplifiers by embedding a transformer between a gate and a drain terminal of a common gate transistor in a cascode topology. The embedded transformer can introduce an additional high-frequency conjugate zero pair, which can push the gain rolling-off start-up point to a higher frequency, peak the higher frequency gain, and broaden the low noise amplifier gain bandwidth.