Antenna element with conductors formed on outer surfaces of device substrate

• US 6,700,543 B2
• Filed: 04/25/2002
• Issued: 03/02/2004
• Est. Priority Date: 06/15/2001
• Status: Expired due to Fees

• Current Assignee: Netcomsec Co., Ltd.
• Original Assignee: Nec Microwave Tube, Ltd. (NEC Corporation), NEC Tokin Corporation (Yageo Corporation)
• Inventors: Konishi, Takayoshi, Ikeda, Masashi, Minegishi, Kazuo
• Primary Examiner(s): Wong, Dong
• Assistant Examiner(s): CHEN, SHIH CHAO
• Application Number:
  US10/131,462
• Publication Number:
  US 20020190907A1
• Time in Patent Office: 677 Days
• Field of Search: 343/700.MS, 343/702, 343/829, 343/846, 343/848
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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

Abstract

An antenna element has parallel first conductor and second conductor connected by a short-circuit conductor to form a loaded inductance. A ground conductor is also formed on an outer surface of a device substrate which is formed with a conductive line comprised of the first conductor, second conductor and short-circuit conductor. The ground conductor has a terminate end connected to the conductive line, and is applied with a ground potential at a leading end. Since the ground conductor functions in a manner similar to a conventional short pin, the antenna element can provide a radiation resistance twice as much.

Claims

1. An antenna element comprising:

a power supply conductor made of a linear conductor and supplied with electric power at a leading end thereof;

a first conductor directly connected at a right angle to a terminate end of said power supply conductor;

a short-circuit conductor directly connected at a right angle to a terminate end of said first conductor, and positioned on an opposite side of said power supply conductor;

a second conductor directly connected at a right angle to a terminate end of said short-circuit conductor and positioned in parallel to said first conductor;

a device substrate made of at least one of a dielectric material and a magnetic material and formed with a continuous conductive line comprised of at least said power supply conductor, said first conductor, said short-circuit conductor, and said second conductor; and

a ground conductor formed on said device substrate, and having a terminate end connected to said conductive line and a leading end applied with a ground potential.

2. The antenna element according to claim 1, further comprising a capacitive conductor having a given capacitance, said capacitive conductor being connected to a terminate end of said second conductor and formed as part of said conductive line.

3. The antenna element according to claim 1, wherein said ground conductor has the terminate end electromagnetically coupled to said conductive line in non-contact manner.

4. The antenna element according to claim 1, wherein said ground conductor has a terminate end directly connected to said conductive line.

5. An antenna apparatus comprising:

an antenna element with,

a power supply conductor made of a linear conductor and supplied with electric power at a leading end thereof;

a first conductor connected at a right angle to a terminate end of said power supply conductor;

a short-circuit conductor connected at a right angle to a terminate end of said first conductor, and positioned on an opposite side of said power supply conductor;

a second conductor connected at a right angle to a terminate end of said short-circuit conductor and positioned in parallel to said first conductor;

a device substrate made of at least one of a dielectric material and a magnetic material and formed with a continuous conductive line comprised of at least said power supply conductor, said first conductor, said short-circuit conductor, and said second conductor; and

a ground conductor formed on said device substrate, and having a terminate end connected to said conductive line and a leading end applied with a ground potential;

said antenna apparatus further comprising,

a circuit board, said antenna element being mounted on a front surface of said circuit board;

a ground electrode formed on the front surface of said circuit board at a position spaced apart from said antenna element for generating a ground potential; and

a ground wire formed on the front surface of said circuit board, and having a leading end connected to said ground electrode and a terminate end connected to a leading end of said ground conductor.

11. A radio communication apparatus comprising:

the antenna apparatus according to claim 5;

power supply means for supplying electric power to the power supply conductor of said antenna apparatus; and

signal transmitting means for feeding a transmission signal to the conductive line of said antenna apparatus.

12. A radio communication apparatus comprising:

the antenna apparatus according to claim 5;

power supply means for supplying electric power to the power supply conductor of said antenna apparatus; and

signal receiving means for acquiring a received signal from the conductive line of said antenna apparatus.

13. A radio communication apparatus comprising:

the antenna apparatus according to claim 5;

power supply means for supplying electric power to the power supply conductor of said antenna apparatus;

signal transmitting means for feeding a transmission signal to the conductive line of said antenna apparatus; and

signal receiving means for acquiring a received signal from the conductive line of said antenna apparatus.

6. An antenna apparatus comprising:

a power supply conductor made of a linear conductor and supplied with electric power at a leading end thereof;

a first conductor connected at a right angle to a terminate end of said power supply conductor;

a short-circuit conductor connected at a right angle to a terminate end of said first conductor, and positioned on an opposite side of said power supply conductor;

a second conductor connected at right angle to a terminate end of said short-circuit conductor and positioned in parallel to said first conductor;

a device substrate made of at least one of a dielectric material and a magnetic material and formed with a conductive line comprised of at least said power supply conductor, said first conductor, said short-circuit conductor, and said second conductor;

a circuit board, said device substrate being mounted on a front surface of said circuit board;

a ground electrode formed on the front surface of said circuit board at a position spaced apart from said device substrate for generating a ground potential; and

a ground wire formed on the front surface of said circuit board and having a leading end connected to said ground electrode and a terminate end connected to said conductive line.

7. The antenna apparatus according to claim 6, further comprising a capacitive conductor having a given capacitance, said capacitive conductor being connected to a terminate end of said second conductor and formed as part of said conductive line.

8. The antenna apparatus according to claim 6, wherein said ground wire has a terminal end electromagnetically coupled to said conductive line in non-contact manner.

9. The antenna apparatus according to claim 6, wherein said ground wire has a terminal end directly connected to said conductive line.

10. An antenna apparatus comprising:

a continuous conductive line made of a linear conductor and supplied with electric power at a leading end thereof;

a device substrate made of at least one of a dielectric material and a magnetic material and formed with said conductive line;

a circuit board, said device substrate being mounted on a front surface of said circuit board;

a ground electrode formed on the front surface of said circuit board at a position spaced apart from said device substrate for generating a ground potential;

a power supply electrode formed on a front surface of said circuit board, and having a terminate end directly connected to said continuous conductive line of said device substrate, and a leading end supplied with electric power; and

a ground wire formed on the front surface of said circuit board, and having a leading end connected to said ground electrode and a terminate end connected to said power supply electrode.