H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/57
H01Q 1/32 (2006.01) H01Q 1/08 (2006.01) H01Q 1/12 (2006.01)
Patent
CA 1121912
S P E C I F I C A T I O N TO ALL WHOM IT MAY CONCERN: BE IT KNOWN THAT I, DALE R PARFITT, a citizen of the United States, residing at 2528 Tenth Avenue North, Apt. 202P, Lake worth, Florida 33461, in the County of Palm Beach, and State of Florida, have made a new and useful improvement in HALF-WAVE COMMUNICATIONS ANTENNA ASSEMBLY of which the following is a specification. ABSTRACT OF THE DISCLOSURE A half-wave length communications antenna assembly especially adapted to be mounted on non-conductive surfaces, such as on a window of a vehicle. The antenna assembly desir- ably includes an electrically shortened half-wave inductively loaded radiating whip loaded at its base end by a loading capacitor plate to be fLxed to a non-conductive surface. The whip is coupled through the non-conductive surface to a trans- mission line internally of the vehicle by a coupling capacitor plate which, with the loading capacitor plate, forms a coupling capacitor. A tuned circuit which is tuned to the nominal reson- ant frequency of the whip is connected to the coupling capacitor plate and serves as an impedance matching circuit between the half-wave whip and the transmission line. The tuned circuit also affects the radiation pattern of the whip to produce a pattern more typical of a five-eighths wave length antenna to provide somewhat greater gain.
324029
Allen Telecom Inc.
Fetherstonhaugh & Co.
LandOfFree
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