1. Slide1Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS) Submission Title: [CRL & CRL-UWB Consortium, Lower-band UWB Antenna] Date Submitted: [March 15,2004] Source: [Kamya Yekeh Yazdandoost, Ryuji Kohno] Company [(1) Communications Research Laboratory (CRL), (2) CRL-UWB Consortium] Connector’s Address [3-4, Hikarino-oka, Yokusuka, 239-0847, Japan] Voice: [+81-46-847-5435], FAX: [+81-46-847-5431] E-mail: [yazdandoost@crl.go.jp, kohno@crl.go.jp] Re: [IEEE P802.15 Alternative PHY Call for Proposals, IEEE P802.15-02/327r7] Abstract: [ Ultra-Wideband Antenna for Lower Band of UWB system.] Purpose: [Antenna for 802.15.TG3a] 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(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) 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.]

2. Slide2Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium LOWER-BAND UWB ANTENNA Kamya Yekeh Yazdandoost, Ryuji Kohno Communications Research Laboratory (CRL) & CRL-UWB Consortium presented by Yuko Rikuta Communications Research Laboratory (CRL)

3. Slide3Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Contents Introduction Antenna Design Results Conclusions

4. Slide4Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Introduction Compact size while providing acceptable: 1- VSWR 2- Bandwidth 3- Gain 4- Efficiency Omni-directional pattern To be suitable for on chip design, with easy impedance matching Light weight Low cost  Therefore, the UWB antenna design remains to be the major face in the progress of UWB technology

5. Slide5Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Antenna Design Prototype Size: 25 × 24 × 1 mm 25 mm 24 mm 1 mm i.Substrate: FR4 (ε r = 4.4, tanθ = 0.02) ii.Patch: Copper (18 um) iii.Feed: Transmission Line 50 Ω

6. Slide6Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Prototype Total size of antenna, including the tapered transmission line.

7. Slide7Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results VSWR Frequency (GHz) VSWR

8. Slide8Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results Frequency (GHz) Return Loss Return Loss (dB)

9. Slide9Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results Frequency (GHz) Gain Gain (dBi)

10. Slide10Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results Radiation Pattern (dBi) F = 3.1 (GHz) φ = 0 o φ = 90 o

11. Slide11Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results Radiation Pattern (dBi) F = 4.1 (GHz) φ = 0 o φ = 90 o

12. Slide12Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results Radiation Pattern (dBi) F = 5.1 (GHz) φ = 0 o φ = 90 o

13. Slide13Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Results 3D Radiation Pattern

14. Slide14Submission doc.:IEEE802.15-04-0115-00-003a March 2004 CRL & CRL-UWB Consortium Conclusions Ultimate radiation pattern for wireless device Fulfilled the required bandwidth for lower band Small antenna on FR4 substrate, which is suitable for lower. frequency band of UWB system, 3.1-5.1( GHz) Average gain of 1(dBi) was shown to be achievable over the the frequency range Easy to design and cheap