1. 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 [sschoi@etri.re.kr] 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

2. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 2 Wideband Antenna Design for UWB System Sang-Sung Choi (sschoi@etri.re.kr)sschoi@etri.re.kr Jong-Kweon Park(pjk64148@etri.re.kr) Bong-Hyuk Park(bhpark@etri.re.kr) Seung-Sik Lee(rfsslee@etri.re.kr) Jae-Young Kim(jyk@etri.re.kr) www.etri.re.kr

3. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 3 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

4. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 4 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 mm Copper thickness = 0.035mm Loss tangent = 0.002 Size : 30mm x 30mm

5. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 5 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

6. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 6 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

7. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 7 Antenna characteristic Measured group delay in the boresight direction

8. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 8 Antenna characteristic The minimum gain is –0.43 dBi, the maximum gain is 3.1 dBi and gain variation has less than 3.53 dB

9. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 9 Antenna characteristic Gain patterns in the azimuth plane 3.5 GHz 6.0 GHz 8.5 GHz : Co-polarization : Cross-polarization

10. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 10 Antenna characteristic Elevation gain patterns 3.5 GHz 6.0 GHz 8.5 GHz : Co-polarization : Cross-polarization

11. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 11 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 cableMeasured characteristic using antenna

12. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 12 Real appearance The real size is 30mm by 30mm and backside has no copper. It has the omni-directional characteristic.

13. Submission doc.: IEEE 802. 15-04/323r0 July 2004 ETRISlide 13 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