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

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Project IEEE P802.15 Working Group for Wireless
Personal Area Networks (WPANS)
doc. IEEE 802.15-04/323r0
July 2004

• 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_at_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.

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Wideband Antenna Design for UWB System

• Sang-Sung Choi (sschoi_at_etri.re.kr)
• Jong-Kweon Park(pjk64148_at_etri.re.kr)
• Bong-Hyuk Park(bhpark_at_etri.re.kr)
• Seung-Sik Lee(rfsslee_at_etri.re.kr)
• Jae-Young Kim(jyk_at_etri.re.kr)

www.etri.re.kr
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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

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Antenna architecture
Antenna architecture is based on CPW feeding and
matched using multi-step impedance matching
technique
Substrate information 4.5 H0.76 mm Copper
thickness 0.035mm Loss tangent 0.002 Size
30mm x 30mm
Matching
Ground
CPW feeding
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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
Network analyzer
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Antenna characteristic
The distance between two antennas is 15 cm.
Insertion loss is constant from 3.1 GHz to 8.3 GHz
Network analyzer
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Antenna characteristic
Measured group delay in the boresight direction
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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
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Antenna characteristic
Gain patterns in the azimuth plane
8.5 GHz
6.0 GHz
3.5 GHz
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Antenna characteristic
Elevation gain patterns
8.5 GHz
6.0 GHz
3.5 GHz
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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 cable
Measured characteristic using antenna
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Real appearance
The real size is 30mm by 30mm and backside has no
copper. It has the omni-directional
characteristic.
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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