FM diversity feed system for the solar-ray antenna
First Claim
Patent Images
1. An antenna system for a vehicle, said vehicle having a conductive vehicle body that acts as an electrical ground, said antenna system including an electrically conducting structure formed on a vehicle window, said system comprising:
- an antenna tuning element;
an impedance matching element electrically connected to the tuning element, said impedance matching element providing impedance matching relative to the vehicle body;
a first FM antenna feed electrically coupled to the tuning element, said first antenna feed including a first coaxial cable having an inner conductor electrically coupled to the tuning element and an outer conductor electrically coupled to the vehicle body; and
a second FM antenna feed electrically coupled to the impedance matching element, said second antenna feed including a second coaxial cable having an inner conductor electrically coupled to the impedance matching element and an outer conductor electrically coupled to the vehicle body.
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Abstract
An FM diversity feed for a solar-ray antenna system formed in the windshield of a vehicle. The FM diversity feed includes a conductive patch formed on an inside surface of an inner glass layer of the windshield at one of the lower corners of the windshield. The diversity feed is capacitively coupled to an impedance matching element of the solar-ray antenna formed between an outer glass layer and the inner glass layer of the windshield.
19 Citations
20 Claims
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1. An antenna system for a vehicle, said vehicle having a conductive vehicle body that acts as an electrical ground, said antenna system including an electrically conducting structure formed on a vehicle window, said system comprising:
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an antenna tuning element;
an impedance matching element electrically connected to the tuning element, said impedance matching element providing impedance matching relative to the vehicle body;
a first FM antenna feed electrically coupled to the tuning element, said first antenna feed including a first coaxial cable having an inner conductor electrically coupled to the tuning element and an outer conductor electrically coupled to the vehicle body; and
a second FM antenna feed electrically coupled to the impedance matching element, said second antenna feed including a second coaxial cable having an inner conductor electrically coupled to the impedance matching element and an outer conductor electrically coupled to the vehicle body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A solar-ray antenna system for a vehicle positioned on a windshield of the vehicle, said vehicle having a conductive vehicle body that acts as an electrical ground, said windshield including an outer glass layer and an inner glass layer, said system comprising:
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an elongated antenna tuning element disposed between the outer and inner glass layers at an upper portion of the windshield;
an impedance matching element disposed between the outer and inner glass layers at a bottom portion of the windshield and being electrically connected to the elongated tuning element by a first narrowed conductive portion, said impedance matching element providing impedance matching relative to the vehicle body;
a first antenna feed electrically coupled to the tuning element through a second narrowed conductive portion on an opposite side of the tuning element from the first narrowed conductive portion, said first antenna feed including a first coaxial cable having an inner conductor electrically coupled to the tuning element and an outer conductor electrically coupled to the vehicle body; and
a second FM antenna feed electrically coupled to the impedance matching element at a location in a parasitic slot transmission line defined between the impedance matching element and the conductive body of the vehicle, said second antenna feed including a second coaxial cable having an inner conductor electrically coupled to the impedance matching element and an outer conductor electrically coupled to the vehicle body. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of feeding a vehicle antenna system positioned on a vehicle window, said vehicle having a conductive vehicle body that acts as an electrical ground, said method comprising the steps of:
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providing an antenna tuning element in the vehicle window;
providing an impedance matching element in the window and electrically connected to the tuning element, said impedance matching element providing impedance matching relative to the conductive body;
feeding the antenna from a first feed location electrically coupled to the tuning element, said first antenna feed including a first coaxial cable having an inner conductor electrically coupled to the tuning element and an outer conductor electrically coupled to the vehicle body; and
feeding the antenna from a second feed location electrically coupled to the impedance matching element, said second antenna feed including a second coaxial cable having an inner conductor electrically coupled to the impedance matching element and an outer conductor electrically coupled to the vehicle body. - View Dependent Claims (19, 20)
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Specification