Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS)
Submission Title: [Wideband Antenna Design for UWB System]
Date Submitted: [July 2004]Revised: []
Source: [Sang-sung Choi, Jongkweon Park, Bonghyuk Park, Seungsik Lee, Jaeyoung Kim] Company [Electronics and Telecommunications Research Institute] Address [161 Gajeong-dong, Yuseong-gu, Daejeon, 305-350 Korea] Voice : [+82-42-860-6722], FAX : [+82-42-860-5199], E-mail [[email protected]]
Re: [Technical contribution]
Abstract: [This presentation presents the design of wideband antenna for UWB system]
Purpose: [Technical contribution to characteristics of novel wideband antenna for ultra wideband system]
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual or organization. The material in this document is subject to change in form and content after further study. The contributor reserves the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.
July 2004 doc.: IEEE 802.15-04/323r0
July 2004
ETRISlide 2Submission
doc.: IEEE 802. 15-04/323r0
Wideband Antenna Design for UWB System
Sang-Sung Choi ([email protected])
Jong-Kweon Park([email protected])
Bong-Hyuk Park([email protected])
Seung-Sik Lee([email protected])
Jae-Young Kim([email protected])
E T R I
www.etri.re.kr
July 2004
ETRISlide 3Submission
doc.: IEEE 802. 15-04/323r0
Overview
• Planar type linear polarization antenna has been developed for ultra wideband system
• This antenna covers wideband from 3.1 GHz to 8.3 GHz with small size and implemented in omni-directionally
• Antenna architecture is a patch and CPW feeding
July 2004
ETRISlide 4Submission
doc.: IEEE 802. 15-04/323r0
Antenna architecture
CPW feeding
Ground
Matching
Antenna architecture is based on CPW feeding and matched using multi-step impedance matching technique
Substrate information=4.5
H=0.76 mmCopper thickness = 0.035mm
Loss tangent = 0.002Size : 30mm x 30mm
r
July 2004
ETRISlide 5Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
S parameter characteristics are measured like following figure. The return loss is less than 10 dB from 3.1 GHz to 8.3 GHz
DUT
Network analyzer
July 2004
ETRISlide 6Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
The distance between two antennas is 15 cm. Insertion loss is constant from 3.1 GHz to 8.3 GHz
DUT
Network analyzer
July 2004
ETRISlide 7Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
Measured group delay in the boresight direction
July 2004
ETRISlide 8Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
-2.00
0.00
2.00
4.00
6.00
8.00
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
Frequency [GHz]
Ga
in [
dB
i]
The minimum gain is –0.43 dBi, the maximum gain is 3.1 dBi and gain variation has less than 3.53 dB
July 2004
ETRISlide 9Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
Gain patterns in the azimuth plane
3.5 GHz 6.0 GHz 8.5 GHz
: Co-polarization : Cross-polarization
July 2004
ETRISlide 10Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
Elevation gain patterns
3.5 GHz 6.0 GHz 8.5 GHz
: Co-polarization : Cross-polarization
July 2004
ETRISlide 11Submission
doc.: IEEE 802. 15-04/323r0
Antenna characteristic
The impulse generator transmit impulse signal using this antenna and is measured by oscilloscope. The signal level is reduced 1/10 because of path loss but the impulse response is similar with the source.
Signal source using cable Measured characteristic using antenna
July 2004
ETRISlide 12Submission
doc.: IEEE 802. 15-04/323r0
Real appearance
The real size is 30mm by 30mm and backside has no copper. It has the omni-directional characteristic.
July 2004
ETRISlide 13Submission
doc.: IEEE 802. 15-04/323r0
Summary• Small size and simple architecture wideband antenna
is developed for UWB system.
1) This antenna covers from 3.1GHz to 8.3GHz wideband
2) The group delay and insertion loss characteristics are very constant