A Balanced Even Harmonic Quadrature Mixer Using Anti Parallel Diode Pairs

Mitsuhiro SHIMOZAWA; Noriharu SUEMATSU; Kenji ITOH; Yoji ISOTA

doi:10.1093/ietele/e89-c.12.1821

A Balanced Even Harmonic Quadrature Mixer Using Anti Parallel Diode Pairs

Mitsuhiro SHIMOZAWA, Noriharu SUEMATSU, Kenji ITOH, Yoji ISOTA

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An even harmonic quadrature mixer (EH-QMIX) with a balanced configuration is proposed for a direct conversion receiver. The unit even harmonic mixer (EHMIX) used for I/Q paths consists of two anti parallel diode pairs (APDPs) and a pair of diplexers. When the second harmonic of LO (2LO) from the LO section is applied to the LO port as a spurious component, a conventional single-ended EHMIX using APDP converts the 2LO leakage from the LO section into the baseband and the d.c. offset and the self-detected LO noise arise at the baseband degrade the sensitivity. This proposed balanced EHMIX configuration can cancel out the 2LO leakage in itself. Therefore, the d.c. offset and the LO noise are significantly suppressed and the degradation of the sensitivity can be avoided. The suppression characteristic of the d.c. offset and the LO noise are verified by the simulation and the measurements. By using this balanced configuration, the fabricated EH-QMIX achieves wider frequency band characteristic than that of the single-ended EH-QMIX, and it shows 20% relative bandwidth at L-band.

Publication: IEICE TRANSACTIONS on Electronics Vol.E89-C No.12 pp.1821-1828

Publication Date: 2006/12/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1093/ietele/e89-c.12.1821

Type of Manuscript: Special Section PAPER (Special Section on Emerging Microwave Techniques)

Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits

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Mitsuhiro SHIMOZAWA, Noriharu SUEMATSU, Kenji ITOH, Yoji ISOTA, "A Balanced Even Harmonic Quadrature Mixer Using Anti Parallel Diode Pairs" in IEICE TRANSACTIONS on Electronics, vol. E89-C, no. 12, pp. 1821-1828, December 2006, doi: 10.1093/ietele/e89-c.12.1821.
Abstract: An even harmonic quadrature mixer (EH-QMIX) with a balanced configuration is proposed for a direct conversion receiver. The unit even harmonic mixer (EHMIX) used for I/Q paths consists of two anti parallel diode pairs (APDPs) and a pair of diplexers. When the second harmonic of LO (2LO) from the LO section is applied to the LO port as a spurious component, a conventional single-ended EHMIX using APDP converts the 2LO leakage from the LO section into the baseband and the d.c. offset and the self-detected LO noise arise at the baseband degrade the sensitivity. This proposed balanced EHMIX configuration can cancel out the 2LO leakage in itself. Therefore, the d.c. offset and the LO noise are significantly suppressed and the degradation of the sensitivity can be avoided. The suppression characteristic of the d.c. offset and the LO noise are verified by the simulation and the measurements. By using this balanced configuration, the fabricated EH-QMIX achieves wider frequency band characteristic than that of the single-ended EH-QMIX, and it shows 20% relative bandwidth at L-band.
URL: https://globals.ieice.org/en_transactions/electronics/10.1093/ietele/e89-c.12.1821/_p

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@ARTICLE{e89-c_12_1821,
author={Mitsuhiro SHIMOZAWA, Noriharu SUEMATSU, Kenji ITOH, Yoji ISOTA, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Balanced Even Harmonic Quadrature Mixer Using Anti Parallel Diode Pairs},
year={2006},
volume={E89-C},
number={12},
pages={1821-1828},
abstract={An even harmonic quadrature mixer (EH-QMIX) with a balanced configuration is proposed for a direct conversion receiver. The unit even harmonic mixer (EHMIX) used for I/Q paths consists of two anti parallel diode pairs (APDPs) and a pair of diplexers. When the second harmonic of LO (2LO) from the LO section is applied to the LO port as a spurious component, a conventional single-ended EHMIX using APDP converts the 2LO leakage from the LO section into the baseband and the d.c. offset and the self-detected LO noise arise at the baseband degrade the sensitivity. This proposed balanced EHMIX configuration can cancel out the 2LO leakage in itself. Therefore, the d.c. offset and the LO noise are significantly suppressed and the degradation of the sensitivity can be avoided. The suppression characteristic of the d.c. offset and the LO noise are verified by the simulation and the measurements. By using this balanced configuration, the fabricated EH-QMIX achieves wider frequency band characteristic than that of the single-ended EH-QMIX, and it shows 20% relative bandwidth at L-band.},
keywords={},
doi={10.1093/ietele/e89-c.12.1821},
ISSN={1745-1353},
month={December},}

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TY - JOUR
TI - A Balanced Even Harmonic Quadrature Mixer Using Anti Parallel Diode Pairs
T2 - IEICE TRANSACTIONS on Electronics
SP - 1821
EP - 1828
AU - Mitsuhiro SHIMOZAWA
AU - Noriharu SUEMATSU
AU - Kenji ITOH
AU - Yoji ISOTA
PY - 2006
DO - 10.1093/ietele/e89-c.12.1821
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E89-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2006
AB - An even harmonic quadrature mixer (EH-QMIX) with a balanced configuration is proposed for a direct conversion receiver. The unit even harmonic mixer (EHMIX) used for I/Q paths consists of two anti parallel diode pairs (APDPs) and a pair of diplexers. When the second harmonic of LO (2LO) from the LO section is applied to the LO port as a spurious component, a conventional single-ended EHMIX using APDP converts the 2LO leakage from the LO section into the baseband and the d.c. offset and the self-detected LO noise arise at the baseband degrade the sensitivity. This proposed balanced EHMIX configuration can cancel out the 2LO leakage in itself. Therefore, the d.c. offset and the LO noise are significantly suppressed and the degradation of the sensitivity can be avoided. The suppression characteristic of the d.c. offset and the LO noise are verified by the simulation and the measurements. By using this balanced configuration, the fabricated EH-QMIX achieves wider frequency band characteristic than that of the single-ended EH-QMIX, and it shows 20% relative bandwidth at L-band.
ER -