Antenna module for a portable radio equipment with a grounding conductor

• US 5,631,660 A
• Filed: 11/07/1995
• Issued: 05/20/1997
• Est. Priority Date: 08/06/1993
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Aoki, Kazuyoshi, Kamei, Kohichi, Maeda, Takeyasu, Inagaki, Mitsuo, Higashiguchi, Yutaka, Amano, Toshiaki
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): PHAN, THO GIA
• Application Number:
  US08/590,470
• Time in Patent Office: 560 Days
• Field of Search: 343/700 MS, 343/702, 343/745, 343/750, 343/828, 343/861, 343/723, 343/724, 343/846, 343/848
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 9/0442 with particular tuning means
• CPC Class Codes: H01Q 9/0471 Non-planar, stepped or wedge-shaped patch

Abstract

An antenna module capable of finely adjusting the resonant frequency and having an antenna element exclusively used for radio transmission and reception to provide a broad frequency band characteristic. This antenna module is composed of a dielectric substrate molded in a predetermined shape, a grounding conductor in the form of sheet provided on one surface of the dielectric substrate, and antenna element conductor in the form of sheet provided on the opposite surface to the above one surface and having end portion being almost V-shaped end folded, and an adjusting member inserted into the almost V-shaped folded end portion.

Claims

1. An antenna module comprising:

a dielectric substrate molded in a predetermined shape;

a grounding conductor in the form of a sheet provided on one surface of said dielectric substrate;

an antenna element conductor in the form of a sheet provided on an opposite surface to said one surface of said dielectric substrate and having a substantially V-shaped folded end portion; and

an adjusting member inserted into said V-shaped folded end portion,

wherein said adjusting member is composed of a dielectric portion and a conductor in the form of a sheet provided on a surface of said dielectric portion, and said conductor has an electrical contact with said V-shaped folded end portion and has a portion externally protruding from said end portion to effectively extend the length of said antenna element conductor.

2. An antenna module as claimed in claim 1 wherein said dielectric substrate is molded with a material of resin.

3. An antenna module as claimed in claim 1 wherein said grounding conductor and said antenna element conductor are each composed of a plastic film and a cupper leaf provided on said plastic film.

4. An antenna module comprising:

a dielectric substrate molded in a predetermined shape;

a grounding conductor in the form of a sheet provided on one surface of said dielectric substrate;

an antenna element conductor in the form of a sheet provided on an opposite surface to said one surface of said dielectric substrate and having a substantially V-shaped folded end portion; and

an adjusting member inserted into said V-shaped folded end portion,

wherein said adjusting member is composed of a dielectric portion and a conductor in the form of a sheet provided on at least one of the surfaces of said dielectric portions, and said conductor has an electrical contact with said V-shaped folded end portion to determine an electrical distance from said grounding conductor to said end portion.

5. An antenna module comprising:

a dielectric substrate molded in a predetermined shape having first and second portions as a unit;

a common grounding conductor in the form of a sheet provided on one surface of said first and second portions of said dielectric substrate;

a first antenna element conductor in the form of a sheet provided on an opposite surface to said one surface of said first portion of said the dielectric substrate; and

a second antenna element conductor in the form of a sheet provided on an opposite surface to said one surface of said second portion of said dielectric substrate;

a resonance frequency of said the first antenna element conductor being different from that of said second antenna element conductor,

wherein said dielectric substrate has a vacant space between said first antenna element conductor and said common grounding conductor and a vacant space between said second antenna element and said common grounding conductor, and

further comprising a dielectric adjusting member inserted into one of said vacant spaces so that the resonance frequencies of said first and second antenna element conductors are different from each other.

6. An antenna module as claimed in claim 5 wherein said dielectric substrate is molded of a material of resin.

7. An antenna module, comprising:

a dielectric substrate molded in a predetermined shape having first and second portions as a unit;

a common grounding conductor in the form of a sheet provided on one surface of said first and second portions of said dielectric substrate;

a first antenna element conductor in the form of a sheet provided on an opposite surface to said one surface of said first portion of said the dielectric substrate; and

a second antenna element conductor in the form of a sheet provided on an opposite surface to said one surface of said second portion of said dielectric substrate;

a resonance frequency of said the first antenna element conductor being different from that of said second antenna element conductor,

wherein said first and second antenna element conductors have respectively looped leading ends to make the antenna module a P-type antenna.

8. An antenna module as claimed in claim 7 wherein said antenna element conductors have each a leading portion externally extending from said dielectric substrate, said leading portion being composed of a grounding wire and a feeder electrically connected to a body of a respective one of said antenna element conductors.