Substrate integrated antenna

Details Substrate integrated antenna Substrate integrated antenna

1994-02-07

1995-06-27

Hajec, Donald

Communications: radio wave antennas

Antennas

With radio cabinet

343853, 343700MS, H01Q 124

Patent

active

054283620

ABSTRACT:
An antenna (110), enclosed within a compact area of a radio (100), is not susceptible to electric fields generated from metallic shields (102, 104) located within the radio. The antenna consists of four sections of traces disposed onto a circuit board (108). The first section is a quarter-wave feed (202), which is coupled to a radio transceiver (118). The quarter-wave feed (202) converts a low impedance point (122) to a high impedance region (203). The second section of antenna (110) capacitively couples to the high impedance region (203). The third section is an isolator section (208) of half a wavelength for providing isolation from the shields (102, 104). The fourth section, quarter-wavelength radiator (214), is a trace electrically equivalent to a quarter of a wavelength having a high impedance and providing the radiating port of the antenna (110).

REFERENCES:
patent: 4847626 (1989-07-01), Kahler et al.
patent: 5349364 (1994-09-01), Bryanos et al.

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