The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
직접 변환 아키텍처를 갖춘 광대역 RF 프런트 엔드가 개발되었습니다. RF 프런트 엔드는 두 개의 광대역 직각 위상 믹서, 다중 대역 국부 발진기 및 광대역 저잡음 가변 이득 증폭기(LNVGA)로 구성됩니다. 믹서는 동위상 전력 분배기와 45도 전력 분배기를 통합하여 광대역 특성을 달성합니다. 동위상 전력 분배기는 보상 커패시터를 추가하여 광대역 특성을 구현합니다. 45도 전력 분배기는 보상 커패시터와 보상 저항을 추가하여 광대역 위상 특성을 구현합니다. VCO 900개, 주파수 분배기 2.5개, 스위치 1.6개로 구성된 로컬 오실레이터는 FDD 시스템 3개를 포함해 900개 시스템을 커버할 수 있다. LNVGA는 인덕터나 커패시터와 같은 리액턴스 요소를 사용하지 않고도 광대역 특성을 달성합니다. 시험 시연에서 RF 주파수가 2.5MHz ~ 30GHz일 때 복조기용 믹서는 2.4dB 미만의 진폭 균형과 900도 미만의 직교 위상 오류를 실험적으로 보여주었습니다. RF 주파수가 2.5MHz에서 2.1GHz 사이일 때 변조기용 믹서는 -28dBc 미만의 이미지 비율을 보여주었습니다. 국부 발진기는 XNUMX가지 시스템(PDC, PHS, XNUMXGHz WLAN)의 목표 주파수를 커버할 수 있는 다중 대역 특성을 보여주었습니다. XNUMXMHz ~ XNUMXGHz에서 증폭기는 XNUMXdB 미만의 잡음 지수와 XNUMX의 이득을 나타냅니다.
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Munenari KAWASHIMA, Tadao NAKAGAWA, Hitoshi HAYASHI, Kenjiro NISHIKAWA, Katsuhiko ARAKI, "A 0.9-2.6 GHz Broadband RF Front-End Chip-Set with a Direct Conversion Architecture" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 12, pp. 2732-2740, December 2002, doi: .
Abstract: A broadband RF front-end having a direct conversion architecture has been developed. The RF front-end consists of two broadband quadrature mixers, a multi-band local oscillator, and a broadband low-noise variable gain amplifier (LNVGA). The mixer achieves broadband characteristics through the incorporation of an in-phase power divider and a 45-degree power divider. The in-phase power divider achieves broadband characteristics through the addition of a compensation capacitor. The 45-degree power divider achieves broadband phase characteristics through the addition of a compensation capacitor and a compensation resistor. The local oscillator, which is composed of two VCOs, two frequency dividers, and four switches, can cover three systems including one FDD system. The LNVGA achieves its broadband characteristics without the use of reactance elements, such as inductors or capacitors. In a trial demonstration, when the RF frequency was between 900 MHz and 2.5 GHz, the mixer for a demodulator experimentally demonstrated an amplitude balance of less than 1.6 dB and a quadrature phase error of less than 3 degrees. When the RF frequency was between 900 MHz and 2.5 GHz, the mixer for a modulator demonstrated an image ratio of less than -30 dBc. The local oscillator demonstrated multi-band characteristics, which are able to cover the target frequencies for three systems (PDC, PHS, 2.4 GHz WLAN). From 900 MHz to 2.5 GHz, the amplifier shows a noise figure of less than 2.1 dB and a gain of 28
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_12_2732/_p
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@ARTICLE{e85-b_12_2732,
author={Munenari KAWASHIMA, Tadao NAKAGAWA, Hitoshi HAYASHI, Kenjiro NISHIKAWA, Katsuhiko ARAKI, },
journal={IEICE TRANSACTIONS on Communications},
title={A 0.9-2.6 GHz Broadband RF Front-End Chip-Set with a Direct Conversion Architecture},
year={2002},
volume={E85-B},
number={12},
pages={2732-2740},
abstract={A broadband RF front-end having a direct conversion architecture has been developed. The RF front-end consists of two broadband quadrature mixers, a multi-band local oscillator, and a broadband low-noise variable gain amplifier (LNVGA). The mixer achieves broadband characteristics through the incorporation of an in-phase power divider and a 45-degree power divider. The in-phase power divider achieves broadband characteristics through the addition of a compensation capacitor. The 45-degree power divider achieves broadband phase characteristics through the addition of a compensation capacitor and a compensation resistor. The local oscillator, which is composed of two VCOs, two frequency dividers, and four switches, can cover three systems including one FDD system. The LNVGA achieves its broadband characteristics without the use of reactance elements, such as inductors or capacitors. In a trial demonstration, when the RF frequency was between 900 MHz and 2.5 GHz, the mixer for a demodulator experimentally demonstrated an amplitude balance of less than 1.6 dB and a quadrature phase error of less than 3 degrees. When the RF frequency was between 900 MHz and 2.5 GHz, the mixer for a modulator demonstrated an image ratio of less than -30 dBc. The local oscillator demonstrated multi-band characteristics, which are able to cover the target frequencies for three systems (PDC, PHS, 2.4 GHz WLAN). From 900 MHz to 2.5 GHz, the amplifier shows a noise figure of less than 2.1 dB and a gain of 28
keywords={},
doi={},
ISSN={},
month={December},}
부
TY - JOUR
TI - A 0.9-2.6 GHz Broadband RF Front-End Chip-Set with a Direct Conversion Architecture
T2 - IEICE TRANSACTIONS on Communications
SP - 2732
EP - 2740
AU - Munenari KAWASHIMA
AU - Tadao NAKAGAWA
AU - Hitoshi HAYASHI
AU - Kenjiro NISHIKAWA
AU - Katsuhiko ARAKI
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2002
AB - A broadband RF front-end having a direct conversion architecture has been developed. The RF front-end consists of two broadband quadrature mixers, a multi-band local oscillator, and a broadband low-noise variable gain amplifier (LNVGA). The mixer achieves broadband characteristics through the incorporation of an in-phase power divider and a 45-degree power divider. The in-phase power divider achieves broadband characteristics through the addition of a compensation capacitor. The 45-degree power divider achieves broadband phase characteristics through the addition of a compensation capacitor and a compensation resistor. The local oscillator, which is composed of two VCOs, two frequency dividers, and four switches, can cover three systems including one FDD system. The LNVGA achieves its broadband characteristics without the use of reactance elements, such as inductors or capacitors. In a trial demonstration, when the RF frequency was between 900 MHz and 2.5 GHz, the mixer for a demodulator experimentally demonstrated an amplitude balance of less than 1.6 dB and a quadrature phase error of less than 3 degrees. When the RF frequency was between 900 MHz and 2.5 GHz, the mixer for a modulator demonstrated an image ratio of less than -30 dBc. The local oscillator demonstrated multi-band characteristics, which are able to cover the target frequencies for three systems (PDC, PHS, 2.4 GHz WLAN). From 900 MHz to 2.5 GHz, the amplifier shows a noise figure of less than 2.1 dB and a gain of 28
ER -