ULTRA-WIDEBAND SLOT BOW-TIE ANTENNA FOR CANADA

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Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANS)
Submission Title CRL-UWB Consortium
Ultra-Wideband Antenna Date Submitted January
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
81-56-847-5435, 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 This
presentation is Introduction to the
Ultra-Wideband Antenna for 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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ULTRA-WIDEBAND ANTENNA

• Kamya Yekeh Yazdandoost ,
• Ryuji Kohno
• Communications Research Laboratory (CRL)
• CRL-UWB Consortium
• Yokohama National University

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Presentation Overview

• Summary of Previously Proposed Antenna
• New UWB Antenna Design
• Results
• Conclusions

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Previous Antenna Prototype
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Summary of Previous Antenna

• A thin and small antenna on FR-4 substrate
• Frequency ranged covered by antenna is 3.8 -
  10.6 GHz
• VSWR 2.8
• Return loss -6.5 dB
• Gain 2.2 - 4.7 dBi

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New UWB Antenna Design

• Prototype Size 44 20.5 0.46 mm

20.5 mm
0.46 mm
44 mm

1. Substrate Teflon (er 2.17 , tan? 0.0006)
2. Patch Copper (18 um)
3. Feed Microstrip Line 50 O

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Results
VSWR
New Design
Bow-Tie Antenna
Frequency (GHz)
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Results
Return Loss (dB)
Bow-Tie Antenna
New Design
Frequency (GHz)
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Results
Gain (dBi)
Bow-Tie Antenna
New Design
Frequency (GHz)
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Results

• Radiation Pattern

Etotal (dB) at f 3.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 4.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 5.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 6.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 7.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 8.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 9.5 (GHz) for ------- f
0o f 90o
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Results

• Radiation Pattern (Cont.)

Etotal (dB) at f 10.5 (GHz) for ------- f
0o f 90o
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Results
3D Radiation Pattern
New Design
Bow-Tie Antenna
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Conclusions

• A thin and small antenna on Teflon substrate

• Easy to design for on chip device

• Satisfied the required bandwidth for UWB systems
  

• Greater than 4 dBi gain was shown to be
  achievable over
• the frequency range

• The 3D radiation pattern of antenna is showing
  that, it has excellent
  performance for wireless devices, especially for
  UWB system