Digital receiving antenna device for a digital television

Details Digital receiving antenna device for a digital television Digital receiving antenna device for a digital television

2007-03-20

2007-03-20

Wong, Don (Department: 2163)

Communications: radio wave antennas

Antennas

With housing or protective covering

C343S791000, C343S866000, C343S702000

Reexamination Certificate

active

11151623

ABSTRACT:
A digital receiving antenna device is connected to a digital television through a coaxial cable and has a casing, a flat antenna, a coaxial cable connector and a coaxial transmission line. The flat antenna is mounted in the casing and connected electronically to the coaxial cable through the coaxial transmission line. Since the coaxial transmission line has a fixed capacitance without regard to the distance between the feed point and the coaxial cable connector, a fixed capacitor is connected between the flat antenna and the coaxial cable connector. Therefore, the coaxial transmission line can be used as a transmission line for different size flat antennas, and each coaxial transmission line will have the same impedance. These different size digital receiving antenna devices can use the same antenna signal processing circuit and still have an impedance match between the flat antenna and the antenna signal processing circuit.

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