Radio frequency lens

Details Radio frequency lens Radio frequency lens

1977-08-29

1979-11-27

Richardson, Robert L.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343854, 343754, H01Q 326

Patent

active

041763220

ABSTRACT:
The inventive lens focuses a plurality of radio frequency signals received by a multi-element antenna array into a coherent signal.
A circular transmission cavity has probe sites located therein. The probe sites are located on radii of the circular cavity approximately one quarter wavelength of the radio frequency of interest from the cavity's perimeter. A probe pair is positioned at each probe site. The signal from each antenna element is coupled through a three port circulator to a particular probe pair via a 180.degree. coupler. Incoherent images received at the probe pair are dumped in a load resistor, whereas the focused image of the received signal is routed through the circulator and to a receiver.

REFERENCES:
patent: 3568207 (1971-03-01), Boyns
patent: 3587004 (1971-06-01), Parad
patent: 3852761 (1974-12-01), Bogner
patent: 3916417 (1975-10-01), Wong et al.

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