Matching cable for automobile antennas for receiving FM broadcas

Details Matching cable for automobile antennas for receiving FM broadcas Matching cable for automobile antennas for receiving FM broadcas

1981-01-27

1982-09-28

Lieberman, Eli

Communications: radio wave antennas

Antennas

With vehicle

343860, H01Q 132

Patent

active

043521070

ABSTRACT:
A matching cable of the invention comprises a coaxial cable which is detachably connected at its one end to a first end of an antenna cable a second end of which is connected to an automobile antenna element, and which is detachably connected at its other end to an AM/FM receiver; and a capacitor connected to the central conductor and the outer conductor of the coaxial cable at the other end. The length of the coaxial cable is so determined that the resistance components of the impedance as viewed from the other end of the coaxial cable are substantially equal to the input impedance of the receiver and the reactance components are inductive at substantially the central frequency of the region of the receiving FM bands for which the improvement of the VSWR is desired. The electrostatic capacitance of the capacitor is such that the inductive reactance may be substantially cancelled.

REFERENCES:
patent: 2911643 (1959-11-01), Gergely
patent: 4228544 (1980-10-01), Guyton
patent: 4268805 (1981-05-01), Tanner et al.

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