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Compact Lower-Band UWB Antenna Design for IEEE 802.15 TG3a

This submission by CRL & CRL-UWB Consortium presents a compact UWB antenna design for the lower band of UWB systems, aimed to meet the requirements of IEEE P802.15 TG3a. The design focuses on providing acceptable VSWR, bandwidth, gain, and efficiency in an omni-directional pattern. The antenna prototype boasts a small size, compatibility for on-chip designs, light weight, and cost-effectiveness. Results showcase the prototype's VSWR, return loss, gain, and radiation patterns across different frequencies. The conclusions highlight the antenna's suitability for the lower UWB frequency band (3.1-5.1 GHz), ease of design, affordability, and performance.

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Compact Lower-Band UWB Antenna Design for IEEE 802.15 TG3a

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  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] 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.] CRL & CRL-UWB Consortium

  2. LOWER-BAND UWB ANTENNA Kamya Yekeh Yazdandoost , Ryuji Kohno Communications Research Laboratory (CRL) & CRL-UWB Consortium presented by Yuko Rikuta Communications Research Laboratory (CRL) CRL & CRL-UWB Consortium

  3. Contents • Introduction • Antenna Design • Results • Conclusions CRL & CRL-UWB Consortium

  4. 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 CRL & CRL-UWB Consortium

  5. Antenna Design Prototype Size: 25 × 24 × 1 mm 24 mm 1 mm 25 mm Substrate: FR4 (εr = 4.4 , tanθ = 0.02) Patch: Copper (18 um) Feed: Transmission Line 50 Ω CRL & CRL-UWB Consortium

  6. Prototype Total size of antenna, including the tapered transmission line. CRL & CRL-UWB Consortium

  7. Results VSWR VSWR Frequency (GHz) CRL & CRL-UWB Consortium

  8. Results Return Loss Return Loss (dB) Frequency (GHz) CRL & CRL-UWB Consortium

  9. Results Gain Gain (dBi) Frequency (GHz) CRL & CRL-UWB Consortium

  10. Results Radiation Pattern (dBi) F = 3.1 (GHz) φ= 0o φ= 90o CRL & CRL-UWB Consortium

  11. Results Radiation Pattern (dBi) F = 4.1 (GHz) φ= 0o φ= 90o CRL & CRL-UWB Consortium

  12. Results Radiation Pattern (dBi) F = 5.1 (GHz) φ= 0o φ= 90o CRL & CRL-UWB Consortium

  13. Results 3D Radiation Pattern CRL & CRL-UWB Consortium

  14. 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 CRL & CRL-UWB Consortium

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