Antenna

Details Antenna Antenna

2007-04-17

2007-04-17

Nguyen, Hoang V. (Department: 2821)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C343S824000

Reexamination Certificate

active

11239257

ABSTRACT:
A transmission line includes transmission lines parallel and perpendicular, respectively, to a flat portion of a reflector, and the parallel transmission line and the flat portion form a first strip line and the perpendicular transmission line and a conductive plate similarly form a second strip line. Radiators and the transmission line have a radiation impedance and a characteristic impedance, respectively, both set at 150Ω when the antenna's output terminal has a reference impedance of 75Ω. If the parallel transmission line has a midpoint serving as the output terminal of the antenna this portion's receiving current is divided in two so that an impedance of half that of the strip line can be provided and a coaxial cable can directly be connected to the transmission line. A matcher or a mixer is not included in the antenna, and matching and mixing losses can be prevented.

REFERENCES:
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Deal et al., IEEE Transactions on Microwave Theory and Techniques, vol. 48, No. 6, pp. 910-918, (Jun. 2000).
Karl Rothammel: “Antennenbuch”, Franckh-Kosmos Verlags-GMBH & Co., Stuttgart, pp. 70-71, 423, 452-456, (1991), no month.

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