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Low-Profile, Cavity-Backed Slot Antenna Using a High Impedance Reflector

Technology Benefits

The new UC technology provides the following benefits: Very low-profile design (thickness is only lo/28, rather than lo/4 for conventional CBS antennas); Easy to fabricate, due to its planar feature; Can be readily applied to cavity-backed slot arrays.

Technology Application

This invention has applications in several areas, such as: Airborne communication; Phase-array antennas; Satellite communications; Wireless local area network; Microwave energy transmission systems.

Detailed Technology Description

Scientists at the University of California have developed a low-profile CBS antenna with a very thin cavity. The design uses a grounded dielectric substrate as both a reflector in the cavity as well as an open circuit boundary at the resonant frequency to maintain good impedance matching.

Supplementary Information

Patent Number: US6518930B2
Application Number: US2001872201A
Inventor: Itoh, Tatsuo | Qian, Yongxi | Yang, Fei Ran
Priority Date: 2 Jun 2000
Priority Number: US6518930B2
Application Date: 1 Jun 2001
Publication Date: 11 Feb 2003
IPC Current: H01Q000138 | H01Q000904 | H01Q001318 | H01Q001500
US Class: 343767 | 343700MS
Assignee Applicant: The Regents of the University of California
Title: Low-profile cavity-backed slot antenna using a uniplanar compact photonic band-gap substrate
Usefulness: Low-profile cavity-backed slot antenna using a uniplanar compact photonic band-gap substrate
Summary: For airborne and satellite communications.
Novelty: Cavity-backed slot antenna for satellite communication, has uniplanar compact photonic band-gap substrate which behaves as open boundary at resonant frequency of slot in cavity substrate

Industry

ICT/Telecom

Sub Category

Telecommunication

Application No.

6518930

Others

BACKGROUND

Antennas used in airborne and satellite communications need to be flush mounting, low cost and lightweight. Cavity-backed slot (CBS) antennas meet these criteria. The cavity height is usually designed such that it is one or three-quarter wavelengths of the resonator frequency, which maintains good impedance matching. The cavity volume can be reduced through dielectric loading, but at the cost of reducing bandwidth and efficiency.

Additional Technologies by these Inventors

• Backfire-to-endfire Leaky-wave Antenna
• Self-biased Receiver System
• Miniaturized Split Ring Resonator Planar Antenna
• Polarization Standing Wave Cavity Assisted By Anisotropic Structures

Tech ID/UC Case

10194/2000-375-0

Related Cases

2000-375-0

*Abstract

None

*IP Issue Date

Feb 11, 2003

*Principal Investigator

Name: Tatsuo Itoh

Department:

Name: Yongxi Qian

Department:

Name: Fei-Ran Yang

Department:

Country/Region

USA