Small planar antenna with enhanced bandwidth and small strip radiator

• US 7,355,559 B2
• Filed: 12/15/2006
• Issued: 04/08/2008
• Est. Priority Date: 08/21/2004
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Min, Young-hoon, Kim, Yong-jin, Tikhov, Yuri
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US11/639,247
• Publication Number:
  US 20070096993A1
• Time in Patent Office: 480 Days
• Field of Search: 343/700.MS, 343/895, 343/767, 343/770, 343/846
• US Class Current: 343/895
• 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 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 5/28 Arrangements for establishing polarisation or beam width over two or more different wavebands
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

A planar small antenna and a small strip radiator are provided which have increased bandwidth. The small strip radiator has a main strip pattern and a plurality of convoluted strip patterns terminating the main strip pattern at each end. The plurality of convoluted strip patterns are arranged in mirror-symmetrical arrangement with reference to the longitudinal axis of the main strip such that one pair of convoluted strip patterns is convoluted clockwise while another pair is convoluted counterclockwise. As a result, an electrically small antenna radiator requires less metal or conductive material than conventional radiators, and also can operate without adversely affecting the radiation characteristics of the antenna.

Claims

1. A small strip radiator, comprising:

a main strip pattern; and

a plurality of convoluted strip patterns which terminate the main strip pattern at each end,

wherein the plurality of convoluted strip patterns are arranged in a mirror-symmetrical arrangement with reference to the longitudinal axis of the main strip such that one pair of convoluted strip patterns is convoluted in a clockwise direction while another pair of convoluted strip patterns is convoluted in a counterclockwise direction.

2. The small strip radiator of claim 1, wherein the main strip includes a centrally placed gap which is a feeding point of the radiator.

3. The small strip radiator of claim 2, further comprising a feed which includes a direct inlet of an electronic chip into the gap.

4. The small strip radiator of claim 1, wherein the main strip pattern and the plurality of convoluted strip patterns are formed on dielectric substrate.

5. The small strip radiator of claim 1, further comprising a feed which includes a planar transmission line placed on a dielectric substrate.

6. The small strip radiator of claim 5, wherein the dielectric substrate, the main strip pattern and the convoluted strip patterns are substantially planar.

7. The small strip radiator of claim 1, wherein the main strip pattern and the convoluted strip patterns are formed as a bulk wire.