Radio communication device having a microstrip antenna with integral receiver systems
First Claim
1. A radio communication device comprising:
- a microstrip antenna comprising;
a planar antenna element having first and second major surfaces;
a ground plane coupled to and positioned apart from the planar antenna element to form a space therebetween, the ground plane having first and second major surfaces substantially parallel to the first and second major surfaces of the planar antenna element;
a solid dielectric material positioned between and touching both the second major surface of the planar antenna element and the first major surface of the ground plane, wherein the dielectric material substantially fills the space between the ground plane and the antenna element;
a primary receiver system mechanically coupled to the second major surface of the ground plane for mechanically supporting the primary receiver system; and
a feeder system electrically coupled between the planar antenna element and the primary receiver system for feeding an intercepted radio signal therebetween for down conversion by the primary receiver system, wherein the feeder system is positioned such that the feeder system passes through at least one aperture in the ground plane and in the dielectric material; and
a secondary receiver system coupled to the primary receiver system for demodulating the intercepted radio signal after down conversion by the primary receiver system.
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Accused Products
Abstract
A radio communication device (600) comprises a microstrip antenna (300) having a planar antenna element (302) and a ground plane (314) coupled to the planar antenna element (302). The microstrip antenna further comprises a dielectric material (304) positioned between the planar antenna element (302) and the ground plane (314), and a primary receiver element (325, 326, 328) mechanically coupled to the ground plane (314). The microstrip antenna (300) further comprises a feeder (308, 310) electrically coupled between the planar antenna element (302) and the primary receiver element (325, 326, 328) for feeding an intercepted radio signal therebetween for down conversion by the primary receiver element (325, 326, 328). The radio communication device (600) also comprises a secondary receiver element (828) coupled to the primary receiver element (325, 326, 328) for demodulating the intercepted radio signal after down conversion by the primary receiver element (325, 326, 328).
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Citations
21 Claims
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1. A radio communication device comprising:
a microstrip antenna comprising; a planar antenna element having first and second major surfaces; a ground plane coupled to and positioned apart from the planar antenna element to form a space therebetween, the ground plane having first and second major surfaces substantially parallel to the first and second major surfaces of the planar antenna element; a solid dielectric material positioned between and touching both the second major surface of the planar antenna element and the first major surface of the ground plane, wherein the dielectric material substantially fills the space between the ground plane and the antenna element; a primary receiver system mechanically coupled to the second major surface of the ground plane for mechanically supporting the primary receiver system; and a feeder system electrically coupled between the planar antenna element and the primary receiver system for feeding an intercepted radio signal therebetween for down conversion by the primary receiver system, wherein the feeder system is positioned such that the feeder system passes through at least one aperture in the ground plane and in the dielectric material; and a secondary receiver system coupled to the primary receiver system for demodulating the intercepted radio signal after down conversion by the primary receiver system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A selective call receiver comprising:
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a microstrip antenna for intercepting a radio signal comprising information, the microstrip antenna comprising; a planar antenna element having first and second major surfaces; a ground plane coupled to and positioned apart from the planar antenna element to form a space therebetween, the ground plane having first and second major surfaces substantially parallel to the first and second major surfaces of the planar antenna element; a solid dielectric material positioned between and touching both the second major surface of the planar antenna element and the first major surface of the ground plane, wherein the dielectric material substantially fills the space between the ground plane and the antenna element; a primary receiver system mechanically coupled to the second major surface of the ground plane for mechanically supporting the primary receiver system; and a feeder system electrically coupled between the planar antenna element and the primary receiver system for feeding the intercepted radio signal therebetween for down conversion by the primary receiver system, wherein the feeder system is positioned such that the feeder system passes through at least one aperture in the ground plane and in the dielectric material; a secondary receiver system coupled to the primary receiver system for demodulating the intercepted radio signal after down conversion by the primary receiver system to derive the information; a processor coupled to the secondary receiver system for processing the information; and a display coupled to the processor for displaying the information. - View Dependent Claims (18, 19, 20)
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21. A radio communication device comprising:
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a microstrip antenna comprising; a planar antenna element having first and second major surfaces; a ground plane coupled to the planar antenna element and having first and second major surfaces substantially parallel to the first and second major surfaces of the planar antenna element; a dielectric material positioned between the second major surface of the planar antenna element and the first major surface of the ground plane for electrically insulating the planar antenna element from the ground plane; a primary receiver system mechanically coupled to the second major surface of the ground plane for mechanically supporting the primary receiver system; and a feeder system electrically coupled between the planar antenna element and the primary receiver system for feeding an intercepted radio signal therebetween for down conversion by the primary receiver system, wherein the feeder system is positioned such that the feeder system passes through at least one aperture in the ground plane and in the dielectric material; and a secondary receiver system coupled to the primary receiver system for demodulating the intercepted radio signal after down conversion by the primary receiver system, wherein the microstrip antenna further comprises a conductive shorting element coupled between the ground plane and the planar antenna element and positioned proximate the center of the second major surface of the planar antenna element and the center of the first major surface of the ground plane, and wherein the feeder system comprises first and second feeders coupled to the planar antenna element at first and second coupling points, respectively, on the second major surface of the planar antenna element, the first and second coupling points being positioned at locations different from the center of the second major surface of the planar antenna element and different from each other, and wherein the primary receiver system comprises; first and second primary receivers; first and second combiners coupled to the first and second primary receivers for providing an input signal thereto; and first and second phase shift circuits coupled to the first and second combiners and coupled to the first feeder for receiving a first radio signal therefrom, wherein the first phase-shift circuit shifts the phase of the first radio signal by a first phase shift amount and the second phase shift circuit shifts the phase of the first radio signal by a second phase shift amount, and wherein the first and second combiners are further coupled to the second feeder for receiving a second radio signal therefrom and are also coupled to one of the first and second phase shift circuits for generating first and second predetermined combinations of the first and second radio signals, and wherein the secondary receiver system comprises; first and second secondary receivers coupled to the first and second primary receivers for receiving the first and second predetermined combinations of the first and second radio signals therefrom after down conversion thereby; and switching means coupled to the first and second secondary receivers for switching between the first and second predetermined combinations of the first and second radio signals, wherein the absolute value of the difference between the first and second phase shift amounts is substantially ninety degrees, and wherein the first predetermined combination comprises the sum of the first and second radio signals, and wherein the second predetermined combination comprises the difference between the first and second radio signals.
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Specification