Switchable matching circuits using three dimensional circuit car

Details Switchable matching circuits using three dimensional circuit car Switchable matching circuits using three dimensional circuit car

1997-09-23

1999-11-16

Wong, Don

Communications: radio wave antennas

Antennas

With radio cabinet

343749, 343860, H01Q 124, H01Q 900, H01Q 150

Patent

active

059866071

ABSTRACT:
Radiotelephone antenna assemblies including three-dimensional carrier circuits which integrate separate signal and ground paths on an antenna base assembly and which includes a matching circuit thereon. The present invention configures the antenna assembly passage to define a three dimensional circuit to match the differing impedances generated by retractable top load antennas (retracted and extended impedances) without requiring a separate switching circuit and wiping contacts.

REFERENCES:
patent: 5427532 (1995-06-01), Owen et al.
patent: 5717408 (1998-02-01), Sullivan et al.
patent: 5874921 (1999-02-01), Doherty et al.

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