Antenna and its electronic circuit combination

• US 4,924,237 A
• Filed: 09/13/1988
• Issued: 05/08/1990
• Est. Priority Date: 03/28/1988
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Works Ltd (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Works Ltd (Panasonic Holdings Corporation)
• Inventors: Honda, Kazuhiro, Tatetsuki, Kuniharu, Nakahi, Kazuo, Yamashita, Kouji, Kawai, Masanori
• Primary Examiner(s): Hille, Rolf
• Assistant Examiner(s): Johnson, Doris J.
• Application Number:
  US07/243,744
• Time in Patent Office: 602 Days
• Field of Search: 343/700 MS, 343/702, 343/725, 343/750, 343/751, 343/820, 343/822, 343/848, 343/849, 343/861, 343/855, 455/89, 455/90
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H01Q 9/0442 with particular tuning means
• CPC Class Codes: H05K 1/0237 High frequency adaptations H05K1/0216 takes precedence
• CPC Class Codes: H05K 1/18 Printed circuits structurally associated with non-printed electric components H05K1/0201, H05K1/023, H05K1/0243, and H05K1/16 take precedence

Abstract

An antenna and its electronic circuit combination is presented to comprise a ground conductor plane 30, a radiating conductor plane 40 disposed in parallel spaced relation to the ground plane 30 and shorted at its one end to the ground plane 30. A ground plane 30 is preferably formed on a printed board 10 which is disposed in parallel relation to the radiating plane 40 to define therebetween an open air space. Mounted on the printed board 10 and received within the open air space are electronic components which form a receiving or transmitting electronic circuit 60 associated with the antenna structure and electrically coupled by means of a feed element 20 to a feed point 44 on the radiating plane 40. Consequently, a number of electronic components forming the electronic circuit for the antenna can well be incorporated within the antenna structure by better utilization of the open air space formed between the radiating and ground planes, giving a space saving compact arrangement to the antenna and its electronic combination suitable for installation in a limited space.

Claims

1. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane, said radiating conductor plane is defined by a conductor plate with an access window;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane wherein one or more of said electronic components can be accessed through said access window.

2. An antenna and its electronic circuit combination as set forth in claim 1, wherein

said ground conductor plane has a width equal to that of said radiating conductor plane has a length greater than that of said radiating conductor plane and is shorted at a lengthwise end to a corresponding end of said radiating conductor plane to improve gain with respect to vertical polarization in a plane including a shorting connection perpendicular to ground and radiating planes.

3. An antenna and its electronic circuit combination as set forth in claim 1, wherein

said radiating conductor plane is defined by a ring frame with a center opening, substantially all of said electronic components being disposed on said ground conductor plane at a portion corresponding to said center opening so as to be exposed therethrough.

4. An antenna and its electronic circuit combination as set forth in claim 3, wherein

said radiating conductor plane forming ring frame is composed at least partially of a wire element.

5. An antenna and its electronic circuit combination as set forth in claim 1, wherein

said radiating conductor plane is shorted at said one end to said ground conductor plane by means of a shorting element to leave the other end open with respect to said ground conductor plane, said ground conductor plane provided thereon with an I/O terminal for connection of said electronic circuit to an external device, said I/O terminal located at a portion adjacent to and opposite of said shorting element from the open end of said radiating conductor plane.

6. An antenna and its electronic circuit combination as set forth in claim 1, wherein

said radiating conductor plane is coupled to said ground conductor plane by means of switchable reactance elements at differing points with respect to the shorting point between said radiating and ground conductor planes, said reactance elements being controlled to be selectively switched for electrical connection between said radiating and ground conductor planes.

7. An antenna and its electronic circuit combination as set forth in claim 1, wherein

said ground conductor plane is divided into plural sections which are isolated with respect to a high frequency and first one of which is coupled to said radiating conductor plane by means of said shorting element and said feed element, said first one of said sections being arranged to be selectively coupled to the remaining ones of said sections with respect to such high frequency.

8. An antenna and its electronic circuit combination as set forth in claim 1, wherein

said radiating conductor plane is connected to said ground conductor plane by means of more than one switchable shorting element, said switchable shorting elements being connected at differing points on said radiating conductor plane in relation to said feedpoint and controlled for selective shorting at different points between said radiating conductor plane and said ground conductor plane.

9. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane; and

a printed board comprising a conductor layer on a substrate mounting said electronic components, said conductor layer being etched to provide a conductor loop extending around a periphery of the printed board to define said ground conductor plane and also etched to provide inside of said conductor loop, wiring pattern means for electrical interconnection of said electronic components.

10. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane; and

a printed board with first and second conductor layers on opposite surfaces of a substrate, said first conductor layer confronting said radiating conductor plane and being etched to form a conductor loop which extends a periphery of said printed board to define said ground conductor plane while exposing said substrate inside of said conductor loop to define a mounting section for said electronic components, and said second conductor layer being etched to define thereat wiring pattern means for electrical interconnection of said electronic components.

11. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane; and

a printed board with first and second conductor layers on a substrate, said first conductor layer being on an opposite side of said substrate away from said radiating plane to define thereat said ground conductor plane, and said second conductor layer being printed in the other surface of said substrate for connection with the electronic components mounted on said other surface of the substrate.

12. An antenna and its electronic circuit combination comprising:

a ground conductor plane, said ground conductor plane is defined by a conductor plate with a mounting section of an electrically insulative material;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane, said mounting section for mounting thereon said electronic components which form said electronic circuit, said electronic circuit being grounded to said conductor plate.

13. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane;

a printed board comprising a conductor layer on a substrate mounting said electronic components, said conductor layer being etched to provide a conductor loop extending around a periphery of the printed board to define said ground conductor plane and also etched to provide inside of said conductor loop, wiring pattern means for electrical interconnection of said electronic components, and wherein

said radiating conductor plane is defined by a conductor plate supported on said printed board to define therebetween said open air space for accommodating said electronic components, said conductor plate having a center opening through which said electronic components are exposed such that substantially no electronic components are located between a peripheral region of said radiating conductor plane forming said conductor plate and said ground conductor plane.

14. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane;

said radiating conductor plane is defined by a conductor plate with a fixed shorting element for shorting to said ground conductor plane on which said feed element is disposed with one end in a contactable relation to said feedpoint on said conductor plate defining said radiating conductor plane, said conductor plate being movable relative to said ground conductor plane so as to vary a distance between the feedpoint on said radiating conductor plane and said shorting element for matching adjustment of antenna impedance to an impedance of said electric circuit.

15. An antenna and its electronic circuit combination as set forth in claim 14, wherein said feed element is provided in the form of a screw with a rounded tip for point contact with said radiation conductor plane, said feed element being threadedly supported on said ground conductor plane to make said rounded tip movable away and towards said radiating conductor plane.

16. An antenna and its electronic circuit combination as set forth in claim 14, wherein

said electronic circuit includes a level indicator for indicating the condition of the impedance matching between the antenna impedance and the electronic circuit impedance.

17. An antenna and its electronic circuit combination as set forth in claim 16, wherein

said level indicator is mounted on the ground conductor plane and is viewed through a window provided in said conductor plate defining said radiating conductor plane.

18. An antenna and its electronic circuit combination as set forth in claim 16, wherein said level indicator comprising a plurality of light emitting diodes which are controlled to turn on upon receiving different levels of a radio signal received by said electronic circuit through the antenna, said light emitting diodes being arranged such that a greater number of said diodes are turned on when the radio signal of higher level is received to be indicative of a higher matching efficiency between the antenna impedance and the circuit impedance.

19. An antenna and its electronic circuit combination comprising:

a ground conductor plane;

a radiating conductor plane disposed in parallel and spaced relation to said ground conductor plane to define therebetween an open air space and shorted at one end to said ground conductor plane;

a number of electronic components disposed on said ground conductor plane to form a receiving or transmitting electronic circuit which is electrically coupled by means of a feed element to a feedpoint on said radiating conductor plane, said electronic components being received within said open air space between said ground conductor plane and said radiating conductor plane;

said radiating conductor plane is defined by a ring frame extending in parallel relation to said ground conductor plane and having therein a center opening, said radiating conductor plane being shorted by a first short element to said ground conductor plane and cooperative therewith to constitute a receiving antenna, and further including another radiating plane shorted by a second short element common to said ground conductor plane to be cooperative therewith to constitute a transmitting antenna, said another radiating plane of said transmitting antenna being located within said center opening of said ring frame.

20. An antenna and its electronic circuit combination as set forth in claim 19, wherein

said another radiating plane is coupled to said ground conductor plane by means of a reactance element.