Abstract: A GaAs E-Band transceiver front-end chip set is provided comprising three MMIC devices. The first device includes a circuit for receiving data at baseband, mixing the data with an LO signal having an E-Band frequency, and transmitting a resultant data stream at an upconverted E-Band frequency; a circuit for receiving data having an E-Band frequency, mixing the received data with an LO signal having an E-Band frequency, and downconverting the resultant mixed received signal to an IF; and a circuit for dividing a received LO signal at an E-Band frequency and communicating the LO signal to the transmission and receiver circuits. The second device comprises a circuit for receiving an LO signal at a reference frequency, and multiplying the LO signal to an E-Band frequency.

Abstract: A method and a circuit for detecting transmission of a radio frequency (RF) signal and generating control signals to regulate the operation of a RF converter remotely located from a corresponding transmitter are disclosed. The method comprises the following steps: (a) sensing the direction of a RF signal flowing in an RF transmission line, at a location proximate of the RF converter; (b) generating a low-power RF signal in response to the sensed direction; and (c) transforming the low-power RF signal into a control signal to regulate the operation of the RF converter.

Abstract: A double-balanced monolithic microwave integrated circuit mixer is fabricated on a GaHs substrate with a radio frequency microstrip balun formed thereon and a local oscillator microstrip balun formed thereon. A crossover diode ring is also formed upon the substrate. The radio frequency microstrip balun and the local oscillator microstrip balun provide enhanced electrical isolation between a radio frequency port and a local oscillator port, enhanced spurious response suppression, and enhanced local oscillator noise rejection in only 0.021".times.0.048" of circuit area.

Abstract: A method and a stable local oscillator system for providing a signal centered at a frequency of interest to a radio frequency (RF) converter. The method includes the following steps: (a) generating an output signal which comprises a fundamental signal centered at a fundamental frequency and a harmonic signal centered at the frequency of interest which is equal to an integral multiple of the fundamental frequency; (b) amplifying the output signal such that the harmonic signal is amplified more than the fundamental signal; and (c) bandpass filtering the amplified output signal such that the amplified fundamental signal is substantially suppressed and the amplified harmonic signal is used as a local oscillator in the RF converter. An example is given for the case where the fundamental frequency is 1.67 gigahertz (GHz), and the frequency of interest is 3.34 GHz which is the second harmonic.

Abstract: A method and device for modifying a frequency range of a radio transceiver by mixing a signal to be transmitted by the transceiver with the output of a local oscillator so as to change the frequency thereof to a desired frequency for transmission and by mixing a received radio transmission with the output of a local oscillator so as to change the frequency thereof to a frequency within the nominal reception band of the transceiver.