Printed dipole antenna

• US 7,034,770 B2
• Filed: 05/10/2004
• Issued: 04/25/2006
• Est. Priority Date: 04/23/2002
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Castaneda, Jesus A, Yang, Hung Yu David
• Primary Examiner(s): Chen, Shih-Chao
• Assistant Examiner(s): Lie, Angela M
• Application Number:
  US10/842,604
• Publication Number:
  US 20040207563A1
• Time in Patent Office: 715 Days
• Field of Search: 343/795, 343/700.MS, 343/793
• US Class Current: 343/793
• 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 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

A printed dipole antenna includes a metal trace having first type sections and second type sections, wherein currents within the first type sections substantially cancel and currents the second type sections are substantially cumulative.

Claims

1. A printed dipole antenna comprises:

a metal trace having first type sections and second type sections, wherein currents within the first type sections substantially cancel and currents the second type sections are substantially cumulative, wherein the metal trace has a geometric shape that approximates a sinX/X waveform and where X is limited between +“

a” and

−

“

a”

wherein “

a”

is a finite number along the inner periphery of the antenna.

2. The printed dipole antenna of claim 1 further comprises at least one of:

the metal trace being formed on at least one layer of a printed circuit board; and

the metal trace being formed on at least one layer of an integrated circuit.

3. The printed dipole antenna of claim 1 further comprises:

the metal traces has a length of approximately one-half wavelength of a frequency of signals received or transmitted via the printed dipole antenna.

4. The printed dipole antenna of claim 1 further comprises:

a ground plane printed on another layer and is substantially parallel to the printed dipole antenna.

5. A radio comprises:

receiver section;

transmitter section;

printed antenna; and

antenna switch operable to connect either the receiver section or the transmitter section to the printed antenna, wherein the printed dipole antenna includes;

a metal trace having first type sections and second type sections, wherein currents within the first type sections substantially cancel and currents the second type sections are substantially cumulative, wherein the metal trace has a geometric shape that approximates a sinX/X waveform and where X is limited between +“

a” and

−

“

a”

wherein “

a”

is a finite number along the inner periphery of the antenna.

6. The radio of claim 5, wherein the printed antenna further comprises:

the metal trace having a length of approximately one-half wavelength of a frequency of signals received or transmitted via the printed dipole antenna.

7. The radio of claim 5, wherein the printed dipole antenna further comprises:

a ground plane printed on another layer and is substantially parallel to the printed dipole antenna.