H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/7
H01Q 1/32 (2006.01)
Patent
CA 1308189
71650-22 ABSTRACT OF THE DISCLOSURE A mobile transmitting and receiving communications antenna assembly for use on a vehicle, includes a primary radia- ting element, a secondary radiating element having first and second radiating elements, normal to a longitudinal axis of the primary radiating element to form a ground plane therefor. Impedance matching means, comprising a tuned circuit tuned to the nominal resonant frequency of the capacitively loaded antenna and electrically connected to the second electrically conductive coupling member in the immediate proximity thereof to resonate in conjunction with said primary radiating element. The impedance matching means displaying an impedance which varies between a first impedance at the connection to the second electrically conductive coupling member which is substantially equal to the impedance at the base end of the primary radiating element and a second impedance at least several orders of magnitude less than the first impedance. Means for connecting transmission line means to the impedance matching means at a point where the impedance of the impedance matching means is substantially equal to the impedance of the transmission line. In a first embodiment the primary and secondary radia- ting elements are mounted on opposite sides of a dielectric panel such as a window which capacitively couples the primary radiating element to the transmitter and/or receiver. In an alternative embodiment, the primary and secondary radiating elements are commonly mounted to the interior surface of a dielectric panel.
576616
Alliance Research Corporation
Smart & Biggar
LandOfFree
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