Antenna coupler
First Claim
1. An antenna coupler for coupling a portable radio having an attached antenna system to an external antenna, the attached antenna system including at least one radiator element, the antenna coupler comprising:
- a substrate;
a radio frequency (RF) feed connected from the external antenna to the substrate;
a resonator patch electrically coupled to the RF feed on the substrate, said resonator patch dimensioned to substantially conform to a cross sectional area of the at least one radiator element;
a conductive shield connected to the substrate forming a side wall substantially parallel to the resonator patch, the conductive shield inhibiting radiation of the resonator patch;
an electromagnetic tuning element connected to the substrate through a grounded feed portion, the electromagnetic tuning element forming a second side wall substantially parallel to the resonator patch, said resonator patch and said second side wall receiving a portion of the portable radio including the at least one radiator element, said electromagnetic tuning element dimensioned to provide an optimum impedance between the attached antenna system and the resonator patch; and
wherein the antenna coupler is non-pivotal.
1 Assignment
0 Petitions
Accused Products
Abstract
An antenna coupler (100) for use in a mobile adaptor (102, 300) transfers radio frequency (RF) energy between a portable radio antenna system (204) and an external antenna (124) with minimal coupling losses. The antenna coupler (100) includes a resonator patch (110) and an electromagnetic tuning element (112) forming side walls on a substrate for receiving the portable antenna system (204). The electromagnetic tuning element (112) controls the impedance between the resonator patch (110) and the portable antenna system (204) while the resonator patch transfers the RF energy between the portable radio antenna and the external antenna (124).
88 Citations
21 Claims
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1. An antenna coupler for coupling a portable radio having an attached antenna system to an external antenna, the attached antenna system including at least one radiator element, the antenna coupler comprising:
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a substrate; a radio frequency (RF) feed connected from the external antenna to the substrate; a resonator patch electrically coupled to the RF feed on the substrate, said resonator patch dimensioned to substantially conform to a cross sectional area of the at least one radiator element; a conductive shield connected to the substrate forming a side wall substantially parallel to the resonator patch, the conductive shield inhibiting radiation of the resonator patch; an electromagnetic tuning element connected to the substrate through a grounded feed portion, the electromagnetic tuning element forming a second side wall substantially parallel to the resonator patch, said resonator patch and said second side wall receiving a portion of the portable radio including the at least one radiator element, said electromagnetic tuning element dimensioned to provide an optimum impedance between the attached antenna system and the resonator patch; and wherein the antenna coupler is non-pivotal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-pivotal antenna coupler for coupling a portable radio having a retractable antenna system to an external antenna, the retractable antenna system including a base coil located within a portion of the portable radio and a retracted coil, said antenna coupler comprising:
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a substrate; a radio frequency (RF) feed coupled between the external antenna and the substrate; a resonator patch electrically coupled to the RF feed on the substrate; a conductive shield coupled to the substrate and located substantially parallel to the resonator patch, the conductive shield inhibiting radiation of the resonator patch; and an electromagnetic tuning element coupled to the substrate through a grounded feed portion and located substantially parallel to the resonator patch, the electromagnetic tuning element and the resonator patch receive the retractable antenna system such that the base coil electrically couples to the electromagnetic tuning element and the base coil and retracted coil electrically couple to the resonator patch, the electromagnetic tuning element dimensioned to provide an optimum impedance between the retractable antenna system and the resonator patch. - View Dependent Claims (10, 11)
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12. A method of forming a non-pivotal antenna coupler for improving the impedance match between a portable radio having an attached antenna system and an external antenna, said attached antenna system including at least one radiator element, the method comprising the steps of:
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electrically coupling a radio frequency (RF) signal between the at least one radiator element and a first side of a resonator patch having first and second sides; electrically coupling an electromagnetic tuning element to the at least one radiator element; shielding the second side of the resonator patch; and sizing the electromagnetic tuning element to control the impedance match between the portable radio antenna and the resonator patch. - View Dependent Claims (13)
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14. A mobile adapter for adapting a portable radio antenna to an external antenna, comprising:
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a housing; a radio frequency (RF) feed connected to the external antenna for receiving and transmitting RF energy; a non-pivotal antenna coupler located within the housing, including; a printed circuit board coupled to the RF feed and including a ground plane; a resonator patch coupled to the printed circuit board and RF feed for transferring RF energy to and from the external antenna; and an electromagnetic tuning element coupled to the ground plane of the printed circuit board, said electromagnetic tuning element and resonator patch forming side walls within which to receive the portable radio antenna, said side walls capacitively couple to predetermined portions of the portable radio antenna, said electromagnetic tuning element controlling an impedance seen between the portable radio antenna and the resonator patch. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification