LOWERBAND UWB ANTENNA

1
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
Connectors Address 3-4, Hikarino-oka,
Yokusuka, 239-0847, Japan Voice
81-46-847-5435, FAX [phone]
E-mail yazdandoost_at_crl.go.jp, kohno_at_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.
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LOWER-BAND UWB ANTENNA

• Kamya Yekeh Yazdandoost ,
• Ryuji Kohno
• Communications Research Laboratory (CRL)
• CRL-UWB Consortium
• presented by Yuko Rikuta
• Communications Research Laboratory (CRL)

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Contents

• Introduction
• Antenna Design
• Results
• Conclusions

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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

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Antenna Design

• Prototype Size 25 24 1 mm

24 mm
1 mm
25 mm

• Substrate FR4 (er 4.4 , tand 0.02)
• Patch Copper (18 mm)
• Feed Transmission Line 50 W

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Prototype
Total size of antenna, including the transmission
line.
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Results
VSWR
VSWR
Frequency (GHz)
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Results
Return Loss
Return Loss (dB)
Frequency (GHz)
9
Results
Gain
Gain (dBi)
Frequency (GHz)
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Results
Radiation Pattern (dBi)
F 3.1 (GHz) f 0o f
90o
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Results
Radiation Pattern (dBi)
F 4.1 (GHz) f 0o f
90o
12
Results
Radiation Pattern (dBi)
F 5.1 (GHz) f 0o f
90o
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Results
3D Radiation Pattern
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Conclusions

• Small antenna on FR4 substrate, which is
  suitable for lower . frequency
  band of UWB system, 3.1-5.1( GHz)

• Easy to design and cheap

• Fulfilled the required bandwidth for lower band

• Average gain of 1(dBi) was shown to be
  achievable over the
• the frequency range

• Ultimate radiation pattern for wireless device