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Optical domain reflection-based miniaturized tunable photoelectric time delay network structure

A network structure, photoelectric technology, applied in the direction of radio wave measurement systems, instruments, etc., can solve the problems of limited application, broadband signal transmission loss affecting the performance of the scanning system, and the large volume and weight of the delay unit of the pure electric structure. The effect of time reduction

Inactive Publication Date: 2016-06-22
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Problems solved by technology

The traditional real-time delay is composed of microwave waveguides and coaxial cables. For large phased array antennas, the length of microwave waveguides or cables is on the order of meters, and the transmission loss of broadband signals will seriously affect the performance of the scanning system.
In addition, the volume and weight of the delay unit of the pure electric structure are large, which limits its wide application

Method used

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  • Optical domain reflection-based miniaturized tunable photoelectric time delay network structure
  • Optical domain reflection-based miniaturized tunable photoelectric time delay network structure
  • Optical domain reflection-based miniaturized tunable photoelectric time delay network structure

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Embodiment ，4

[0027] Embodiment, 4bit tunable optical delay network

[0028] as attached figure 2 As shown, after the optical microwave signal enters the time-delay network, it first passes through an optical circulator, and the output from the 2 port of the optical circulator enters the optical switch. The upper and lower optical paths are also switched by the magneto-optical switch, reflected by the optical fiber reflector and then passed through the optical switch. It enters through port 2 of the circulator, and the delay is realized through the output of port 3. Similarly, when the optical switch is switched to the upper path, a direct optical path is realized, and when the optical switch is switched to the lower path, the delay is realized through a delayed optical path of Δt / 2 (the round-trip delay is Δt).

[0029] The whole delay network is composed of 5 delay modules with similar structure, the difference is that the delay time of each delay module is different, which are Δt / 2, Δt...

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Abstract

The invention belongs to the photon microwave signal processing technical field and provides an optical domain reflection-based miniaturized tunable photoelectric time delay network structure. The objective of the invention is to effectively reduce the size of a whole photoelectric delay network. According to the technical schemes of the invention, the optical domain reflection-based miniaturized tunable photoelectric time delay network structure comprises one or more time delay modules which are connected in series between an optical microwave signal input end and an optical microwave signal output end; each time delay module includes a circulator (1), an optical switch (2), time delay devices (3) and reflectors (4); input optical microwave signals are connected with the input end of the circulator (1); the bi-directional port of the circulator (1) is connected with the common port of the optical switch (2); two switchable ports of the optical switch (2) are respectively connected with the time delay devices (3) enabling different time delay length; one end of each time delay device (3) is connected with one reflector (4); and the output end of the circulator outputs optical microwave signals.

Description

technical field [0001] The invention belongs to the photonic microwave signal processing technology, and specifically relates to a miniaturized and tunable optoelectronic time-delay network structure design reflected in the optical domain. Background technique [0002] Since the 1970s, phased array antenna technology (PAA) has been widely used in the radar field due to its unique advantages. In order to realize the wide bandwidth angular scanning of the phased array radar, it is necessary to use the real time delay (TTD) to realize the phase shifting function in the phased array radar. The traditional real-time delay is composed of microwave waveguides and coaxial cables. For large phased array antennas, the length of microwave waveguides or cables is on the order of meters. The transmission loss of broadband signals will seriously affect the performance of the scanning system. In addition, the volume and weight of the delay unit of the pure electric structure are large, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481
Inventor 孔德武郑婷于晋龙
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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