In order to improve the gain and sensitivity of the receiving antenna system, one scheme on how to design active integrated receiving antenna was adopted in the receiving antenna and radio frequency front end system, which can bypass the traditional impedance matching network between the active circuit and the microstrip antenna. Depending on this scheme, the design of active integration between the rectangle microstrip probe-fed antenna and the front end low noise amplifier was performed. The feed of the rectangle microstrip antenna was connected with the input port of the low noise amplifier by one metal probe. When the antenna is resonant at 2.48?GHz, by selecting the proper feed position, the antenna can produce the input impendence needed by the low noise amplifier design. The active integrated probe-fed receiving antenna operates on the S band. The final measurement results show good characteristic.
An Hongming, Nauwelaers B K J C, Antonine R, ��et al��. A novel measurement technique for amplifier-type active antennas . In:IEEE MTT-S International Microwave Symposium Digest vol.3 . San Diego:IEEE, 1994.1473~1476