Windowpane antenna for vehicles
First Claim
1. A vehicle windowpane antenna comprising:
- a VHF double-loop antenna pattern portion including two loops consisting of two conductive wires with connecting ends, the two loops being attached to a windowpane with their connecting ends connected with each other;
a feeder portion provided at the connecting ends of the VHF double-loop antenna pattern portion, and connected to a feeder line;
capacitive coupling portions each including a pair of conductors respectively extending from intermediate portions of the loops of the VHF double-loop antenna pattern portion such that the conductors are opposed to each other and can form a short circuit within the VHF double-loop antenna pattern portion in a high frequency state; and
means for setting the electrostatic capacitance of each of the capacitive coupling portions, such that the capacitive coupling portions are not conductive when a VHF band signal is received, and conductive in a high frequency state when a UHF band signal is received.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle windowpane antenna comprises a first windowpane antenna element and a second windowpane antenna element which cooperate to perform diversity receiving of a VHF band signal and a UHF band signal. Each of the first and second windowpane antenna elements includes a VHF double-loop antenna pattern portion including two loops consisting of two conductive wires with connecting ends, the two loops being attached to a windowpane with their connecting ends connected with each other, a feeder portion provided at the connecting ends of the VHF double-loop antenna pattern portion, and connected to a feeder line, capacitive coupling portions each including a pair of conductors respectively extending from intermediate portions of the loops of the VHF double-loop antenna pattern portion such that the conductors are opposed to each other and can form a short circuit within the VHF double-loop antenna pattern portion in a high frequency state, and a device for setting the electrostatic capacitance of each of the capacitive coupling portions, such that the capacitive coupling portions are not conductive when a VHF band signal is received, and conductive in a high frequency state when a UHF band signal is received.
16 Citations
5 Claims
-
1. A vehicle windowpane antenna comprising:
-
a VHF double-loop antenna pattern portion including two loops consisting of two conductive wires with connecting ends, the two loops being attached to a windowpane with their connecting ends connected with each other; a feeder portion provided at the connecting ends of the VHF double-loop antenna pattern portion, and connected to a feeder line; capacitive coupling portions each including a pair of conductors respectively extending from intermediate portions of the loops of the VHF double-loop antenna pattern portion such that the conductors are opposed to each other and can form a short circuit within the VHF double-loop antenna pattern portion in a high frequency state; and means for setting the electrostatic capacitance of each of the capacitive coupling portions, such that the capacitive coupling portions are not conductive when a VHF band signal is received, and conductive in a high frequency state when a UHF band signal is received. - View Dependent Claims (2, 3)
-
-
4. A vehicle windowpane antenna comprising a first windowpane antenna element and a second windowpane antenna element which cooperate to perform diversity receiving of a VHF band signal and a UHF band signal, each of the first and second windowpane antenna elements including:
-
a VHF double-loop antenna pattern portion including two loops consisting of two conductive wires with connecting ends, the two loops being attached to a windowpane with their connecting ends connected with each other; a feeder portion provided at the connecting ends of the VHF double-loop antenna pattern portion, and connected to a feeder line; capacitive coupling portions each including a pair of conductors respectively extending from intermediate portions of the loops of the VHF double-loop antenna pattern portion such that the conductors are opposed to each other and can form a short circuit within the VHF double-loop antenna pattern portion in a high frequency state; and means for setting the electrostatic capacitance of each of the capacitive coupling portions, such that the capacitive coupling portions are not conductive when a VHF band signal is received, and conductive in a high frequency state when a UHF band signal is received. - View Dependent Claims (5)
-
Specification