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A broadband photonic RF channelizer with large in-band interference suppression is proposed and experimentally demonstrated based on dual optical frequency combs (OFCs) and photonic image-reject mixers (IRMs). A Ku-band RF signal with a bandwidth of 5 GHz is channelized into five sub-channels with 1-GHz instantaneous bandwidth. The in-band interference, which is a serious problem of conventional photonics-based...
RF front-end based on microwave photonics is presented and demonstrated. A proof-of-concept RF front-end covering S-Ka bands is successfully realized. Image-reject frequency down-conversion and channelized receiving is realized. Reconfigurable photonic frequency up-conversion for RF signals emitting is also demonstrated.
Image-reject mixers (IRMs) play an important role in microwave and millimeter-wave receivers to eliminate the interference from the image frequency. The keys to realizing a wideband IRM are the precise 90° phase shifting and parallel frequency mixing within a large operational frequency range. In this paper, we propose and demonstrate a novel photonic scheme that can perform simultaneously wideband...
This paper reviews and discusses the recent efforts on developing optical vector analysis based on swept optical single-sideband modulation, which can achieve the magnitude and phase responses of optical devices with sub-MHz resolution.
A microwave downconverter based on optical single-sideband modulation by a dualdrive Mach-Zehnder modulator and carrier suppression by a fiber Bragg grating is proposed and demonstrated, which implements multi-octave downconversion with suppressed mixing spurs.
Microwave switching is of great importance in satellite communications to realize function switching, signal routing, and system reconfiguration. Photonic approaches to realize the microwave switching have advantages in terms of wide bandwidth, high switching speed and immunity to EMI. In this paper, we present a review on the recent advances of the photonic microwave switching for satellite communications...
Optoelectronic oscillator (OEO) is a promising technique with various applications for high quality microwave generation and signal processing in electro-optical systems. Traditional OEOs are mainly focused on single-frequency oscillation and its applications, while OEOs with the agility of multi-frequency oscillation are rarely reported. In this report, we concentrate on the realization and application...
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