Unlock instant, AI-driven research and patent intelligence for your innovation.

Phased array system based on dispersive delay line

A delay line and phased array technology, applied in the field of phased array systems, can solve the problems of aperture effect, output waveform distortion, beam deflection, etc., and achieve the effects of eliminating aperture effect, good integration and easy integration

Pending Publication Date: 2017-08-08
NANJING UNIV OF SCI & TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The key part of the phased array radar system is the phase shift device. At present, the phase shifter is mainly used in the phased array to realize the phase shift function, which has the following three disadvantages: the beam deflection caused by the frequency offset, and the working bandwidth is inversely proportional to the beam width. and pulse distortion
However, the above system still has the following defects: (1) when the RF signal is a narrow pulse modulation signal, the dispersion delay line has time-domain broadening, resulting in distortion of the output waveform; (2) when the RF signal is not a spot frequency or narrowband signal, due to the dispersion The aperture effect due to the nonlinearity of the delay line still exists

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Phased array system based on dispersive delay line
  • Phased array system based on dispersive delay line
  • Phased array system based on dispersive delay line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, a phased array system based on a four-unit dispersion delay line is taken as an example, including a first channel, a second channel, a third channel and a fourth channel.

[0030] combine figure 2, the four output ports of the first power divider 1 are respectively connected with the first mixer 2, the fourth mixer 12, the seventh mixer 22 and the tenth mixer 32, and the first channel includes the second power Divider 6, first mixer 2, second mixer 7, third mixer 9, first adjustable local oscillator frequency source 4, second adjustable local oscillator frequency source 5, first dispersion delay line 3. The second dispersion delay line 8, the first filter 10 and the first antenna 11, wherein the two output ports of the second power divider 6 are connected to the first mixer 2 and the third mixer 9 respectively; The two channels include a third power divider 16, a fourth mixer 12, a fifth mixer 17, a sixth mixer 19, a third adjustable local oscilla...

Embodiment 2

[0039] The radio frequency signal is a narrow pulse modulation signal, combined with Figure 7 , the local oscillator signal generated by the first adjustable local oscillator frequency source 4 passes through the second power divider 6, and the power is divided to obtain the local oscillator signal A and the local oscillator signal B, and the radio frequency signal is multi-channeled through the first power divider 1. , a radio frequency signal V after power division 1 (t) and the local oscillator signal A through the first mixer 2, down-converted to obtain the intermediate frequency signal V 2 (t), V 2 (t) a certain delay time is generated by the first dispersion delay line 3, and becomes the delayed intermediate frequency signal V 3 (t), V 3 (t) The local oscillator signal generated by the second adjustable local oscillator frequency source 5 passes through the second mixer 7, and obtains an intermediate frequency signal V with a constant frequency after down-conversion ...

Embodiment 3

[0043] The radio frequency signal is a non-point frequency signal with a wide bandwidth, combined with Figure 7 , the local oscillator signal generated by the first adjustable local oscillator frequency source 4 passes through the second power divider 6, and the power is divided to obtain the local oscillator signal A and the local oscillator signal B, and the radio frequency signal is multi-channeled through the first power divider 1. , a radio frequency signal V after power division 1 (t) and the local oscillator signal A through the first mixer 2, down-converted to obtain the intermediate frequency signal V 2 (t), V 2 (t) a certain delay time is generated by the first dispersion delay line 3, and becomes the delayed intermediate frequency signal V 3 (t), V 3 (t) The local oscillator signal generated by the second adjustable local oscillator frequency source 5 passes through the second mixer 7, and obtains an intermediate frequency signal V with a constant frequency afte...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a phased array system based on a dispersive delay line. The phased array system comprises a first power divider and a plurality of phased array channels with the same structure. Each phased array channel comprises a second power divider, a first frequency mixer, a second frequency mixer, a third frequency mixer, a first adjustable local oscillator frequency source, a second adjustable local oscillator frequency source, a first dispersive delay line, a second dispersive delay line, a first filter and a first antenna. Delay time of an RF signal can be adjusted through adjusting the first adjustable local oscillator frequency source and the second adjustable local oscillator frequency source, thereby finally adjusting the output phase of an RF signal. The phased array system realizes random orientation of a phased array wave beam and eliminates an aperture effect caused by frequency offset and waveform distortion caused by dispersion.

Description

technical field [0001] The invention belongs to the technical field of radar communication and short-range detection, in particular to a phased array system based on dispersion delay lines. Background technique [0002] Phased array radar has been widely used in the military, and has the advantages of large radiation power, flexible beam pointing, strong adaptive ability, good anti-jamming performance, and high reliability. Broadband and ultra-wideband phased array radars can not only greatly improve the anti-jamming capability of phased array radars and effectively deal with anti-radiation missiles, but also have a relatively wide bandwidth, which can improve the distance resolution and recognition ability of monitoring targets , so it is important to study it. [0003] The key part of the phased array radar system is the phase shift device. At present, the phase shifter is mainly used in the phased array to realize the phase shift function, which has the following three d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01S13/02
CPCG01S13/02G01S2013/0245Y02D30/70
Inventor 廖明陈春红吴文陈云娇王闻炜张新鹏余云忠
Owner NANJING UNIV OF SCI & TECH