Planar FET Oscillators Using Periodic Microstrip Patch Antennas.

摘要

Planar oscillations in which periodic microstrip antennas are integrated with FET negative resistance elements to form an integrated quasi-optical source are described. The antennas considered here are periodic microstrip patch arrays operated in the leaky-wave stopband. Because of the high VSWR in this case, this type of antenna may be used as both a resonant and a radiating element. Such circuits are suitable for use in millimeter-wave systems as well as at microwave frequencies. A design procedure is given and the performance of X-band prototype circuits is reported. Prototype circuits showed 9 dB isotropic conversion gain and 40 MHz tuning range at 9.5 GHz. Reprints. (JHD)