Tunable ultra-wideband microwave signal generator based on microwave photonic technology
A microwave signal and microwave photonic technology, applied in the field of optical communication, can solve the problems of restricting the modulation of ultra-wideband signals, and achieve the effect of improving flexibility and good tunability
Inactive Publication Date: 2014-08-13
闫连山 +1
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Problems solved by technology
[0005] The above four schemes all use microwave photonic technology to realize the generation of tunable ultra-wideband microwave signals, but few schemes can tunably generate first-, second-, and third-order positive and negative polarity ultra-wideband microwave signals, which restricts Further development of technologies such as modulation of ultra-wideband signals
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[0020] The present invention will be further described below in conjunction with the drawings.
[0021] figure 1 It is a schematic diagram of the structure of the tunable ultra-wideband pulse signal generator of the present invention. This solution is composed of an adjustable spectrum construction unit 109, an optical Fourier transform unit 107, and a photoelectric conversion unit 108. The tunable spectrum construction unit 109 is composed of an optical pulse generator 101, a circulator 102, a specific fiber Bragg grating 103, an optical attenuator 104, a tunable optical comb filter 105, and an optical coupler 106. The circulator 102 and There are two parallel optical paths between the optical couplers 106: one connects the specific fiber Bragg grating 103 and the optical attenuator 104-1 in sequence; the other connects the tunable optical comb filter 105 and the optical attenuator 104-2 in sequence. The optical pulse generator 101 has a wider and flatter spectrum, and the refl...
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The invention discloses a tunable ultra-wideband microwave signal generator based on a microwave photonic technology. The tunable ultra-wideband microwave signal generator comprises a tunable spectrum structure unit 109, an optical Fourier transform unit 107 and a photoelectric conversion unit 108, wherein the tunable spectrum structure unit 109 comprises an optical pulse generator 101, a circulator102, a specific fiber Bragg grating 103, an optical attenuator 104, a tunable comb filter 105 and an optical coupler 106. According to the tunable ultra-wideband microwave signal generator, six spectrums with different orders, different polarities and an ultra-wideband pulse signal shape can be formed in a single module in a tuning manner; the six spectrums can be converted into six corresponding ultra-wideband pulse signals; better tenability is obtained; and according to a given spectrum construction method, the ultra-wideband microwave signals with one, two and three orders and positive and negative polarities can be generated, and thus the flexibility of the ultra-wideband microwave signal generator is greatly improved.
Description
Technical field [0001] The invention relates to the field of optical communication, in particular to the technology of generating ultra-wideband microwave signals by using photon methods. It is suitable for tunable generation of ultra-wideband microwave signals with first, second and third order positive and negative polarities. Background technique [0002] Ultra-wideband signals, also known as UWB signals, have the advantages of low power consumption, low spectral density, and resistance to multipath fading. They are suitable for short-distance high-speed indoor wireless communications or sensor networks. In 2002, the American Communications Association approved the free use of the ultra-wideband signal spectrum (3.1 ~ 10.6 GHz) with an optical power spectral density below -42.3 dBm / MHz. Therefore, the partial bandwidth of the UWB signal should be greater than 20% or the 10dB spectral bandwidth should be greater than 500MHz. [0003] In recent years, an ultra-wideband signal ge...
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IPC IPC(8): H04B1/7163H04B10/2519H04B10/90
Inventor 姜恒云闫连山陈智宇叶佳邹喜华潘炜罗斌
Owner 闫连山