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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-UWB Consortium – Ultra Wideband Printed Bow-Tie Antenna] Date Submitted: [September 2003] Source: [Kamya Yekeh Yazdandoost, Ryuji Kohno] Company [(1) Communications

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

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  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS) Submission Title: [CRL-UWB Consortium – Ultra Wideband Printed Bow-Tie Antenna] Date Submitted: [September 2003] 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: [+81-56-847-5435], 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: [This presentation is Introduction to the Printed Bow-Tie 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.] CRL-UWB Consortium

  2. ULTRA WIDEBAND PRINTED BOW-TIE ANTENNA Kamya Yekeh Yazdandoost Communications Research Laboratory (CRL) & CRL-UWB Consortium Ryuji Kohno Director, UWB Technology Institute, CRL Professor, Yokohama National University Chair, CRL-UWB Consortium CRL-UWB Consortium

  3. Presentation Overview • Introduction • Patch Antenna • Printed Bow-Tie Antenna • UWB Antenna Design Challenge • UWB Printed Bow-Tie Antenna • Wideband Mechanism of Printed Bow-Tie Antenna • Results • Conclusions CRL-UWB Consortium

  4. Introduction • Antenna performance and size have a large impact on the development of wireless system. • It is more complicated to provide the typical parameters like Bandwidth, Efficiency, and Gain within the limited antenna volume. • This is more critical with respect to the UWB Antenna. CRL-UWB Consortium

  5. Patch Antenna • Patch antennas are extensively used in different • wireless applications due to: • Low profile • Light weight • Easy to fabricate • Low cost • The major drawback is narrow bandwidth • Because of it limited bandwidth, several designs of • broadband patch antenna have been reported CRL-UWB Consortium

  6. Printed Bow-Tie Antenna Patch Feed Point Top-View Patch Substrate Ground Plane Side-view CRL-UWB Consortium

  7. UWB Antenna Design Challenge • Compact size while providing acceptable: 1- VSWR 2- Bandwidth 3- Gain 4- Efficiency • Omni-directional pattern • To be suitable for on chip design, with good impedance matching • Light weight • Low cost CRL-UWB Consortium

  8. UWB Printed Bow-Tie Antenna Patch Patch Patch Patch Substrate CRL-UWB Consortium

  9. Wideband Mechanism of Printed Bow-Tie Antenna L L C C CRL-UWB Consortium

  10. Results VSWR Magnitude of VSWR Frequency (GHz) VSWR<3 (3.8 to 10.6GHz) CRL-UWB Consortium

  11. Results S11 Magnitude of Scattering Matrix (dB) Frequency (GHz) S11< -6 dB (3.8 to 10.6GHz) CRL-UWB Consortium

  12. Results Gain Magnitude of Gain (dBi) Frequency (GHz) Gain > 2 dBi (3 to 10.6GHz) CRL-UWB Consortium

  13. Radiation Pattern Results (a) (b) Radiation patterns in (a) φ= 0o and (b) φ= 90o for the proposed antenna at 3.1 GHz. CRL-UWB Consortium

  14. Radiation Pattern (Cont.) Results (a) (b) Radiation patterns in (a) φ = 0o and (b) φ = 90o for the proposed antenna at 5.1 GHz. CRL-UWB Consortium

  15. Radiation Pattern (Cont.) Results (a) (b) Radiation patterns in (a) φ = 0o and (b) φ = 90o for the proposed antenna at 7.1 GHz. CRL-UWB Consortium

  16. Radiation Pattern (Cont.) Results (a) (b) Radiation patterns in (a) φ = 0o and (b) φ = 90o for the proposed antenna at 9.1 GHz. CRL-UWB Consortium

  17. Conclusions • A thin and small antennas on FR-4 substrate • Good radiation patterns for wireless devices • Satisfied the required bandwidth for UWB systems • Greater than 2 dBi gain was shown to be achievable over • the frequency range • Easy to design for on chip device CRL-UWB Consortium

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