Abstract: A device includes (a) a plurality of radio frequency (RF) switches, each operable with a plurality of frequency bands; an RF coupling device; and a processor programmed to selectively control operation of the plurality of RF switches based on an uplink signal from an electronic communication device electromagnetically coupled with the RF coupling device. The processor is programmed to selectively control operation of the plurality of RF switches by causing each of the RF switches to lock on a particular frequency band of the plurality of frequency bands corresponding to a frequency of the uplink signal from the electronic communication device.

Abstract: A device includes (a) a plurality of radio frequency (RF) switches, each operable with a plurality of frequency bands; an RF coupling device; and a processor programmed to selectively control operation of the plurality of RF switches based on an uplink signal from an electronic communication device electromagnetically coupled with the RF coupling device. The processor is programmed to selectively control operation of the plurality of RF switches by causing each of the RF switches to lock on a particular frequency band of the plurality of frequency bands corresponding to a frequency of the uplink signal from the electronic communication device.

Abstract: A multi-stage Doherty power amplifier (“PA”) circuit which achieves superior efficiency over broadband range of frequencies is disclosed. Conventional multi-stage amplifiers may offer potential for efficiency enhancement but may suffer from cost penalties and severe bandwidth limitation in practice. Embodiments may employ a driver in the peaking arm which is biased in class C which may alleviate such limitations. The amplifier topology and associated circuitry described in embodiments may achieve high efficiency, smooth PA gain, and enhanced phase characteristics over a 15% fractional bandwidth with reduced costs.

Abstract: A device includes (a) a plurality of radio frequency (RF) switches, each operable with a plurality of frequency bands; an RF coupling device; and a processor programmed to selectively control operation of the plurality of RF switches based on an uplink signal from an electronic communication device electromagnetically coupled with the RF coupling device. The processor is programmed to selectively control operation of the plurality of RF switches by causing each of the RF switches to lock on a particular frequency band of the plurality of frequency bands corresponding to a frequency of the uplink signal from the electronic communication device.

Abstract: A multi-stage Doherty power amplifier (“PA”) circuit which achieves superior efficiency over broadband range of frequencies is disclosed. Conventional multi-stage amplifiers may offer potential for efficiency enhancement but may suffer from cost penalties and severe bandwidth limitation in practice. Embodiments may employ a driver in the peaking arm which is biased in class C which may alleviate such limitations. The amplifier topology and associated circuitry described in embodiments may achieve high efficiency, smooth PA gain, and enhanced phase characteristics over a 15% fractional bandwidth with reduced costs.

Abstract: A multi-stage Doherty power amplifier (“PA”) circuit which achieves superior efficiency over broadband range of frequencies is disclosed. Conventional multi-stage amplifiers may offer potential for efficiency enhancement but may suffer from cost penalties and severe bandwidth limitation in practice. Embodiments may employ a driver in the peaking arm which is biased in class C which may alleviate such limitations. The amplifier topology and associated circuitry described in embodiments may achieve high efficiency, smooth PA gain, and enhanced phase characteristics over a 15% fractional bandwidth with reduced costs.

Abstract: A two-way terrestrial antenna, employing electrical down tilt and azimuth beam adjustment capability is disclosed. Such antenna configuration allows for a variable antenna coverage footprint within designated coverage sector. To compensate for installation support structure variations the two-way antenna employs a positional sensor that can provide feedback to BTS or automatically compensate azimuth and tilt beam angles so as to provide uniform sector coverage. In particular by monitoring tri-vector gravitational inclinometer and earth magnetic field sensors, and determining correction factors for antenna tilt and azimuth beam adjustments, uniform or compensated sector coverage is provided.

Abstract: A multi-stage Doherty power amplifier (“PA”) circuit which achieves superior efficiency over broadband range of frequencies is disclosed. Conventional multi-stage amplifiers may offer potential for efficiency enhancement but may suffer from cost penalties and severe bandwidth limitation in practice. Embodiments may employ a driver in the peaking arm which is biased in class C which may alleviate such limitations. The amplifier topology and associated circuitry described in embodiments may achieve high efficiency, smooth PA gain, and enhanced phase characteristics over a 15% fractional bandwidth with reduced costs.

Abstract: An on frequency repeater for wireless networks with feedback oscillation detection is disclosed. The on frequency repeater includes an automatic gain control loop which samples amplified signal envelope. The automatic gain control loop is monitored and a characteristic saw tooth pattern in the gain control loop indicating feedback oscillation is detected. A nonlinear gain expander circuit may be periodically activated to allow feedback oscillation detection in repeater applications employing linearized amplifiers.

Abstract: The present invention provides a remote antenna system employing digital imaging means by which the operator can view both the antenna pointing data and the coverage landscape from the antenna radome perspective. The present invention also provides a method for antenna positioning data acquisition and positioning control employing remotely acquired image data.

Abstract: A predistortion linearized amplifier system that uses analog polynomial based predistortion is disclosed. An analog polynomial function generator receives polynomial parameter updates from a polynomial parameter generator. The polynomial parameter generator uses a combination of analog and digital signal processing to create the parameter updates. This processing is performed on input signal amplitude, detected using analog circuits, and RF coupled samples of the input signal, and the output signal. By using a combination of analog and digital signal processing means, digital processing can be performed at sub-Nyquist rates, significantly reducing the cost of digital circuits. Also, since the predistortion modulation signal is created with an analog function generator, time correlating delay is minimized reducing circuit costs.

Abstract: A two-way terrestrial antenna, employing electrical down tilt and azimuth beam adjustment capability is disclosed. Such antenna configuration allows for a variable antenna coverage footprint within designated coverage sector. To compensate for installation support structure variations the two-way antenna employs a positional sensor that can provide feedback to BTS or automatically compensate azimuth and tilt beam angles so as to provide uniform sector coverage. In particular by monitoring tri-vector gravitational inclinometer and earth magnetic field sensors, and determining correction factors for antenna tilt and azimuth beam adjustments, uniform or compensated sector coverage is provided.

Abstract: An on frequency repeater for wireless networks with feedback oscillation detection is disclosed. The on frequency repeater includes an automatic gain control loop which samples amplified signal envelope. The automatic gain control loop is monitored and a characteristic saw tooth pattern in the gain control loop indicating feedback oscillation is detected. A nonlinear gain expander circuit may be periodically activated to allow feedback oscillation detection in repeater applications employing linearized amplifiers.

Abstract: The present invention provides a remote antenna system employing digital imaging means by which the operator can view both the antenna pointing data and the coverage landscape from the antenna radome perspective. The present invention also provides a method for antenna positioning data acquisition and positioning control employing remotely acquired image data.

Abstract: An envelope tracking radio frequency (RF) power amplifier having an adaptive envelope signal processing circuit is disclosed. An RF input voltage is sampled by the adaptive envelope signal processing circuit which provides control signals to the power supply which supplies voltages to RF power devices in order to simultaneously satisfy two operating conditions: a) provide best possible efficiency of the power amplifier stages depending on the input signal characteristics and b) provide compensation for RF transistor AM-AM and AM-PM distortion compensation across the power range. In particular, the voltage control provides for constant power amplifier gain across the input signal dynamic range, thus minimizing power amplifier amplitude distortions and extending the useful power amplifier linear dynamic range up to saturation point. The power amplifier thus exhibits better linearity and efficiency than offered by conventional techniques and topologies.

Abstract: A high efficiency radio frequency (RF) power amplifier having dynamically controlled back off is disclosed. The RF input voltage is sampled by an adaptive analog signal processing circuit. The adaptive analog signal processing circuit controls the supply voltage to RF amplifier devices, such as LDMOS devices, which varies the efficiency or back off of the power amplifier. The variable supply voltage in turn varies peak power of the amplifier.

Abstract: A power amplifier system for high efficiency signal amplification of digitally modulated carrier signal or multi-carrier signals is disclosed. The linearity of the amplifier is improved by providing dynamic load line adjustments through implementation of suitably defined transfer functions employing dynamic control of operational aspects of active devices in the power amplifier.

Abstract: A predistortion linearized amplifier system that uses analog polynomial based predistortion is disclosed. An analog polynomial function generator receives polynomial parameter updates from a polynomial parameter generator. The polynomial parameter generator uses a combination of analog and digital signal processing to create the parameter updates. This processing is performed on input signal amplitude, detected using analog circuits, and RF coupled samples of the input signal, and the output signal. By using a combination of analog and digital signal processing means, digital processing can be performed at sub-Nyquist rates, significantly reducing the cost of digital circuits. Also, since the predistortion modulation signal is created with an analog function generator, time correlating delay is minimized reducing circuit costs.

Abstract: A radio frequency power amplifier has first and second amplifier transistors. The first and second amplifier transistors have a common element thereof electrically interconnected with a common bus. A forked conductor having two legs thereof electrically connected to the common bus, each leg having a distal end proximate one of the first and second amplifier transistors. The common bus and the forked conductor are generally symmetric about an axis about which the first and second amplifier transistors are symmetrically disposed.

Abstract: A power amplifier system for high efficiency signal amplification of digitally modulated carrier signal or multi-carrier signals is disclosed. The linearity of the amplifier is improved by providing dynamic load line adjustments through implementation of suitably defined transfer functions employing dynamic control of operational aspects of active devices in the power amplifier.