Multi-band antenna with a tuned parasitic element

Patent metadata

Field	Value
Publication number	US-2016204520-A1
Application number	US-201514592746-A
Country	US
Kind code	A1
Filing date	Jan 8, 2015
Priority date	Jan 8, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A multi-band antenna having a tuned antenna element is disclosed. The multi-band antenna may simultaneously transmit a first radio frequency (RF) and a second RF signal. The antenna may include a driven antenna element to radiate the first RF signal and a parasitic element to radiate the second RF signal. The parasitic element may be coupled to a ground plane through a tuning circuit. The tuning circuit may modify a resonant wavelength of the parasitic element according to the second RF signal.

First claim

What is claimed is:

1 . A multi-band antenna, comprising:
a first antenna element configured to radiate a first radio frequency (RF) signal; and a stub configured to capacitively couple the first antenna element to a second antenna element configured to radiate a second RF signal.

2 . The antenna of claim 1 , wherein the stub is integrally formed with the second antenna element.

3 . The antenna of claim 1 , wherein the stub is connected to the second antenna element.

4 . The antenna of claim 1 , further comprising:
a tuning circuit, coupled to the second antenna element, configured to modify a resonant wavelength of the second antenna element, wherein the tuning circuit comprises at least one of a variable capacitor or an inductor or a switch or a combination thereof.

5 . The antenna of claim 1 , further comprising:
a tuning circuit, coupled to the second antenna element, configured to couple the second antenna element to a ground plane disposed adjacent to the first antenna element and the second antenna element.

6 . The antenna of claim 1 , further comprising:
a feed point configured to simultaneously receive the first RF signal and the second RF signal.

7 . The antenna of claim 1 , wherein the first antenna element is a driven antenna element, and the second antenna element is a parasitic antenna element configured to capture the second RF signal from the first antenna element.

8 . The antenna of claim 1 , wherein the first antenna element is configured to radiate the first RF signal while the second antenna element is configured to simultaneously radiate the second RF signal.

9 . The antenna of claim 1 , wherein the second antenna element is configured to increase an antenna aperture associated with the multi-band antenna.

10 . The antenna of claim 1 , wherein the first RF signal has a frequency that is higher than a frequency of the second RF signal.

11 . The antenna of claim 1 , wherein the first antenna element is a monopole antenna element.

12 . The antenna of claim 1 , further comprising a third antenna element capacitively coupled to the first antenna element and configured to radiate a third RF signal, different from the first RF signal and the second RF signal.

13 . A multi-band antenna, comprising:
means for radiating a first radio frequency (RF) signal; and means for capacitively coupling the means for radiating the first RF signal to a means for radiating a second RF signal.

14 . The antenna of claim 13 , wherein the means for capacitively coupling is integrally formed with the means for radiating the second RF signal.

15 . The antenna of claim 13 , wherein the means for capacitively coupling is connected to the means for radiating the second RF signal.

16 . The antenna of claim 13 , further comprising:
means for simultaneously receiving the first RF signal and the second RF signal.

17 . The antenna of claim 13 , wherein the means for radiating the first RF signal comprises a driven antenna element, and the means for radiating the second RF signal comprises a parasitic antenna element configured to capture the second RF signal from the means for radiating the first RF signal.

18 . The antenna of claim 13 , wherein the first RF signal has a frequency that is higher than a frequency of the second RF signal.

19 . A method, comprising:
radiating, at a first antenna element, a first radio frequency (RF) signal; and capacitively coupling, via a stub, the first antenna element to a second antenna element radiating a second RF signal.

20 . The method of claim 19 , wherein the stub is integrally formed with the second antenna element.

Assignees

• Qualcomm Inc

Inventors

• Dong Yuandan
• Jenwatanavet Jatupum
• Tran Allen Minh-Triet

Classifications

• H01Q21/0006

  Particular feeding systems · CPC title

• H01Q21/30 Primary

  Combinations of separate antenna units operating in different wavebands and connected to a common feeder system · CPC title

• H01Q5/328 Primary

  between a radiating element and ground · CPC title

• H01Q5/385

  Two or more parasitic elements · CPC title

• H01Q5/357

  using a single feed point · CPC title