BROADBAND MICROSTRIP SUPERHIGH FREQUENCY SHF LENS WITH UNIFORM AMPLITUDE AND LOW PHASE ABERRATION TRANSMISSION CHARACTERISTICS

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microstrip-shaped ultrahigh frequency lens used in an active phased array transmitter, and the like, and has a symmetrical microstrip ultrahigh frequency lens unit, an electromagnetic wave absorber for impedance matching, and an electromagnetic wave absorber in close contact with the lens unit. Reinforced Plastics) structure, an external electromagnetic interference prevention unit, and an outer packaging conductor portion for shielding the ultra-high frequency lens from external electromagnetic waves. In the microstrip conductor pattern of the ultra-high frequency lens unit, a plurality of dummy ports are formed between adjacent beam ports, between adjacent array ports, and on a side wall, and an electromagnetic wave absorber is disposed on the conductor pattern. Therefore, it prevents the loss due to the path difference in the parallel plate area, the effect of the mutual coupling between the microstrip ports, and the degradation of the performance due to the reflected wave on the side wall surface. The amplitude and low phase difference transfer characteristics can be improved.