March 2004

CRL & CRL-UWB ConsortiumSlide1Submission

doc.:IEEE802.15-04-0115-00-003a

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS)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.]

March 2004

CRL & CRL-UWB ConsortiumSlide2Submission

doc.:IEEE802.15-04-0115-00-003a

LOWER-BAND UWB ANTENNA

Kamya Yekeh Yazdandoost , Ryuji Kohno

Communications Research Laboratory (CRL) & CRL-UWB Consortium

presented by Yuko RikutaCommunications Research Laboratory (CRL)

March 2004

CRL & CRL-UWB ConsortiumSlide3Submission

doc.:IEEE802.15-04-0115-00-003a

Contents

• Introduction

• Antenna Design

• Results

• Conclusions

March 2004

CRL & CRL-UWB ConsortiumSlide4Submission

doc.:IEEE802.15-04-0115-00-003a

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

March 2004

CRL & CRL-UWB ConsortiumSlide5Submission

doc.:IEEE802.15-04-0115-00-003a

Antenna Design

Prototype Size: 25 × 24 × 1 mm

25 mm

24 mm 1 mm

i. Substrate: FR4 (εr = 4.4 , tanθ = 0.02)

ii. Patch: Copper (18 um)

iii. Feed: Transmission Line 50 Ω

March 2004

CRL & CRL-UWB ConsortiumSlide6Submission

doc.:IEEE802.15-04-0115-00-003a

Prototype

Total size of antenna, including the tapered transmission line.

March 2004

CRL & CRL-UWB ConsortiumSlide7Submission

doc.:IEEE802.15-04-0115-00-003a

ResultsVSWR

Frequency (GHz)

VS

WR

March 2004

CRL & CRL-UWB ConsortiumSlide8Submission

doc.:IEEE802.15-04-0115-00-003a

Results

Frequency (GHz)

Return Loss R

etur

n L

oss

(dB

)

March 2004

CRL & CRL-UWB ConsortiumSlide9Submission

doc.:IEEE802.15-04-0115-00-003a

Results

Frequency (GHz)

Gain G

ain

(dB

i)

March 2004

CRL & CRL-UWB ConsortiumSlide10Submission

doc.:IEEE802.15-04-0115-00-003a

Results Radiation Pattern (dBi)

F = 3.1 (GHz)

φ = 0o

φ = 90o

March 2004

CRL & CRL-UWB ConsortiumSlide11Submission

doc.:IEEE802.15-04-0115-00-003a

Results Radiation Pattern (dBi)

F = 4.1 (GHz)

φ = 0o

φ = 90o

March 2004

CRL & CRL-UWB ConsortiumSlide12Submission

doc.:IEEE802.15-04-0115-00-003a

Results Radiation Pattern (dBi)

F = 5.1 (GHz)

φ = 0o

φ = 90o

March 2004

CRL & CRL-UWB ConsortiumSlide13Submission

doc.:IEEE802.15-04-0115-00-003a

Results3D Radiation Pattern

March 2004

CRL & CRL-UWB ConsortiumSlide14Submission

doc.:IEEE802.15-04-0115-00-003a

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