All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications
A new microwave photonic signal processing structure for realising in-phase/quadrature (I/Q) mixing is presented. It is based on a dual-drive Mach Zehnder modulator (DDMZM) and an optical phase modulator inside a Sagnac loop interferometer. Two output IF signals with a quadratu...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9531536/ |
| _version_ | 1818441810421219328 |
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| author | Hao Chen Erwin H. W. Chan |
| author_facet | Hao Chen Erwin H. W. Chan |
| author_sort | Hao Chen |
| collection | DOAJ |
| description | A new microwave photonic signal processing structure for realising in-phase/quadrature (I/Q) mixing is presented. It is based on a dual-drive Mach Zehnder modulator (DDMZM) and an optical phase modulator inside a Sagnac loop interferometer. Two output IF signals with a quadrature phase difference are obtained by using two photodetectors to detect the upper and lower sidebands of the optical signal at the Sagnac loop output. A quadrature phase difference in the two IF signals is realised by biasing the DDMZM at the quadrature point. This has the advantage of very little quadrature phase errors as a standard modulator bias controller can accurately lock the DDMZM bias point. The optical phase modulator driven by an RF signal can be placed in a remote location for antenna remoting. Theoretical analysis and simulation show using the proposed I/Q mixer for image rejection can overcome the modulation index dependent image rejection ratio problem in the reported I/Q mixers based on a cascaded modulator structure. The Sagnac loop based I/Q mixer is experimentally verified with results show only ±1° quadrature phase error and more than 50 dB image rejection ratio over the operating frequency range of 6 to 20 GHz. |
| first_indexed | 2024-12-14T18:34:10Z |
| format | Article |
| id | doaj.art-82871926a5ab42759458ad04e49cafd4 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-14T18:34:10Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-82871926a5ab42759458ad04e49cafd42022-12-21T22:51:41ZengIEEEIEEE Photonics Journal1943-06552021-01-011351710.1109/JPHOT.2021.31105899531536All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting ApplicationsHao Chen0https://orcid.org/0000-0003-4711-4438Erwin H. W. Chan1College of Engineering, IT and Environment, Charles Darwin University, Darwin, NT, AustraliaCollege of Engineering, IT and Environment, Charles Darwin University, Darwin, NT, AustraliaA new microwave photonic signal processing structure for realising in-phase/quadrature (I/Q) mixing is presented. It is based on a dual-drive Mach Zehnder modulator (DDMZM) and an optical phase modulator inside a Sagnac loop interferometer. Two output IF signals with a quadrature phase difference are obtained by using two photodetectors to detect the upper and lower sidebands of the optical signal at the Sagnac loop output. A quadrature phase difference in the two IF signals is realised by biasing the DDMZM at the quadrature point. This has the advantage of very little quadrature phase errors as a standard modulator bias controller can accurately lock the DDMZM bias point. The optical phase modulator driven by an RF signal can be placed in a remote location for antenna remoting. Theoretical analysis and simulation show using the proposed I/Q mixer for image rejection can overcome the modulation index dependent image rejection ratio problem in the reported I/Q mixers based on a cascaded modulator structure. The Sagnac loop based I/Q mixer is experimentally verified with results show only ±1° quadrature phase error and more than 50 dB image rejection ratio over the operating frequency range of 6 to 20 GHz.https://ieeexplore.ieee.org/document/9531536/Microwave mixerI/Q mixerimage rejection mixeroptical signal processingoptical modulatorremote antennas |
| spellingShingle | Hao Chen Erwin H. W. Chan All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications IEEE Photonics Journal Microwave mixer I/Q mixer image rejection mixer optical signal processing optical modulator remote antennas |
| title | All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications |
| title_full | All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications |
| title_fullStr | All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications |
| title_full_unstemmed | All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications |
| title_short | All-Optical In-Phase/Quadrature Microwave Mixer for Antenna Remoting Applications |
| title_sort | all optical in phase x002f quadrature microwave mixer for antenna remoting applications |
| topic | Microwave mixer I/Q mixer image rejection mixer optical signal processing optical modulator remote antennas |
| url | https://ieeexplore.ieee.org/document/9531536/ |
| work_keys_str_mv | AT haochen allopticalinphasex002fquadraturemicrowavemixerforantennaremotingapplications AT erwinhwchan allopticalinphasex002fquadraturemicrowavemixerforantennaremotingapplications |