Planar Integrated Circuits for Microwave Transmission and Reception.

摘要

The design and test of planar integrated circuits for the transmission and reception of microwave power are described. The circuits consist of MESFET transistor oscillators incorporating periodic microstrip antennas to form transmitters and transceivers. The nature of the periodic antennas allows their use as both resonant and radiating elements in the oscillator design, resulting in a simple and inexpensive circuit. The transmitter and transceiver circuits described here may be divided into two types; single device and dual device. The single device circuits use a single MESFET oscillating into a periodic microstrip patch antenna. The dual device circuits use two MESFETS which oscillate into a couple rampart line microstrip antenna. In the dual device circuit, the FETs may oscillate out of phase for power combining or in phase for frequency doubling. The transmitter circuits generate a beam of RF energy which radiates normal to the planar circuit surface. The transceiver circuits operate in a similar fashion, except that in this case, the antenna also acts to receive RF energy and direct it back to the oscillating MESFET. The MESFET then functions as a self-oscillating mixer for down-conversion of the received signal to the IF frequency. Planar integrated circuits; Microwave transmission. (emk)