Design of SAW expander and compressor on LiTaO3 for a TCDMA spread spectrum system

L. Reindl; F. Kalabic; G. Ostermayer; A. Pohl; F. Seifert; R. Weigel

Design of SAW expander and compressor on LiTaO₃ for a TCDMA spread spectrum system

L. Reindl, F. Kalabic, G. Ostermayer, A. Pohl, F. Seifert, R. Weigel

Research Center Hagenberg

Publikation: Beitrag in Fachzeitschrift › Konferenzartikel › Begutachtung

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Abstract

We report on the design and performance of SAW minimum-shift-keying (MSK) tapped delay lines (TDL's) using pseudonoise (PN) code sequences of length 128 chips. As a substrate, LiTaO₃-X112°-rotY has been used due to the system requirements of a given CDMA/TDMA system (TCDMA). System IF frequency, bandwidth of the major lobe, and integration time were respectively 360 MHz, 63.5 MHz, and 3 μs. We used SAW TDL's employing non-weighted as well as cosine-apodized input transducers incorporating split-fingers. We designed both expander as well as compressor filters attaining very similar results. We found insertion loss values down to 16 dB and amplitude ripples of less than 2 dB. The close-in selectivity was 28 dB.

Originalsprache	Englisch
Seiten (von - bis)	821-824
Seitenumfang	4
Fachzeitschrift	IEEE MTT-S International Microwave Symposium Digest
Jahrgang	2
Publikationsstatus	Veröffentlicht - 1997
Veranstaltung	Proceedings of the 1997 IEEE MTT-S International Microwave Symposium. Part 1 (of 3) - Denver, CO, USA Dauer: 8 Juni 1997 → 13 Juni 1997

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title = "Design of SAW expander and compressor on LiTaO3 for a TCDMA spread spectrum system",

abstract = "We report on the design and performance of SAW minimum-shift-keying (MSK) tapped delay lines (TDL's) using pseudonoise (PN) code sequences of length 128 chips. As a substrate, LiTaO3-X112°-rotY has been used due to the system requirements of a given CDMA/TDMA system (TCDMA). System IF frequency, bandwidth of the major lobe, and integration time were respectively 360 MHz, 63.5 MHz, and 3 μs. We used SAW TDL's employing non-weighted as well as cosine-apodized input transducers incorporating split-fingers. We designed both expander as well as compressor filters attaining very similar results. We found insertion loss values down to 16 dB and amplitude ripples of less than 2 dB. The close-in selectivity was 28 dB.",

author = "L. Reindl and F. Kalabic and G. Ostermayer and A. Pohl and F. Seifert and R. Weigel",

year = "1997",

language = "English",

volume = "2",

pages = "821--824",

journal = "IEEE MTT-S International Microwave Symposium Digest",

issn = "0149-645X",

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note = "Proceedings of the 1997 IEEE MTT-S International Microwave Symposium. Part 1 (of 3) ; Conference date: 08-06-1997 Through 13-06-1997",

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TY - JOUR

T1 - Design of SAW expander and compressor on LiTaO3 for a TCDMA spread spectrum system

AU - Reindl, L.

AU - Kalabic, F.

AU - Ostermayer, G.

AU - Pohl, A.

AU - Seifert, F.

AU - Weigel, R.

PY - 1997

Y1 - 1997

N2 - We report on the design and performance of SAW minimum-shift-keying (MSK) tapped delay lines (TDL's) using pseudonoise (PN) code sequences of length 128 chips. As a substrate, LiTaO3-X112°-rotY has been used due to the system requirements of a given CDMA/TDMA system (TCDMA). System IF frequency, bandwidth of the major lobe, and integration time were respectively 360 MHz, 63.5 MHz, and 3 μs. We used SAW TDL's employing non-weighted as well as cosine-apodized input transducers incorporating split-fingers. We designed both expander as well as compressor filters attaining very similar results. We found insertion loss values down to 16 dB and amplitude ripples of less than 2 dB. The close-in selectivity was 28 dB.

AB - We report on the design and performance of SAW minimum-shift-keying (MSK) tapped delay lines (TDL's) using pseudonoise (PN) code sequences of length 128 chips. As a substrate, LiTaO3-X112°-rotY has been used due to the system requirements of a given CDMA/TDMA system (TCDMA). System IF frequency, bandwidth of the major lobe, and integration time were respectively 360 MHz, 63.5 MHz, and 3 μs. We used SAW TDL's employing non-weighted as well as cosine-apodized input transducers incorporating split-fingers. We designed both expander as well as compressor filters attaining very similar results. We found insertion loss values down to 16 dB and amplitude ripples of less than 2 dB. The close-in selectivity was 28 dB.

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M3 - Conference article

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JO - IEEE MTT-S International Microwave Symposium Digest

JF - IEEE MTT-S International Microwave Symposium Digest

T2 - Proceedings of the 1997 IEEE MTT-S International Microwave Symposium. Part 1 (of 3)

Y2 - 8 June 1997 through 13 June 1997

ER -

Design of SAW expander and compressor on LiTaO3 for a TCDMA spread spectrum system

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Design of SAW expander and compressor on LiTaO₃ for a TCDMA spread spectrum system