Slot coupled microstrip constrained lens

Details Slot coupled microstrip constrained lens Slot coupled microstrip constrained lens

1988-09-16

1990-02-06

Hille, Rolf

Communications: radio wave antennas

Antennas

With spaced or external radio wave refractor

343700MS, 343770, H01Q 1906

Patent

active

048991643

ABSTRACT:
The microstrip constrained lens is a three-dimensional beamformer comprised of two printed circuit layers. The two circuit boards contain planar arrays of microstrip patches that face in opposite directions, to respectively collect and reradiate energy from a feed suspended behind the structure. It is a wide angle beamformer due to its use of two geometric degrees of freedom: the length of line joining front and back face lens elements varies with radius; and the back face elements are displaced radially instead of being placed directly behind their front face counterparts. An early version of this microwave lens used feed-through pins. In the most recent design the feed-through pins of the first model were replaced with a solderless slot coupler, or capacitive coupler. Without the need to solder the many hundreds of feed-throughs, the device is much easier to fabricate, and its performance is better because there is no degradation introduced by misalignment of the feed-through pins.

REFERENCES:
patent: 4131892 (1978-12-01), Munson et al.
patent: 4263598 (1981-04-01), Bellee et al.
patent: 4316194 (1982-02-01), DeSantis et al.
patent: 4329689 (1982-05-01), Yee
patent: 4381509 (1983-04-01), Rotman et al.
patent: 4489328 (1984-12-01), Gears
patent: 4721966 (1988-01-01), McGrath

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