CN2388720Y

CN2388720Y - Multi-beam forming network system

Info

Publication number: CN2388720Y
Application number: CN 99236773
Authority: CN
Inventors: 郁涛
Original assignee: Shenzhen Zte Corp
Current assignee: ZTE Corp
Priority date: 1999-07-30
Filing date: 1999-07-30
Publication date: 2000-07-19
Anticipated expiration: 2009-07-30

Abstract

The utility model relates to a multi-beam forming network device. The utility model comprises a power divider, a phase shifter, an isolator and a power synthesizer. The utility model is characterized in that frequency carrying signals are divided into a plurality of paths after passing through the power divider, each path reaches the corresponding input end of the power synthesizer after passing through the specified phase shifter and isolator orderly, and each path is exported to aerial array units through the power synthesizer and forms a scan of beams. The utility model has the advantages that the cost is low, the principle and the conformation are simple, the output phase shift of each frequency carrying signal is linear strictly, and a corresponding power divider and a corresponding power synthesizer are also capable of being chosen to form a suitable multi-beam forming network according to the number of the aerial array unites and the number of beams, so the design the phase controlled array antenna has flexibility.

Description

A kind of multiple beam forming network device

The utility model relates to the employed multiple beam forming network device of a kind of phased array antenna equipment.

Utilize same antenna bore to form a plurality of independently launching beams and received beam is an advantage of phased array antenna, multi-beam forms feeding network can produce a plurality of wave beams that cover big sector space simultaneously.For identical beam position, each wave beam has the gain with the simple beam battle array of same size and irradiation basically.Multi-beam forms the wave beam terminal that feeding network all provides a separation.But existing various multi-beam forms feeding network and exists variety of issue.(M.I. Skolnik, " radar system introduction ", National Defense Industry Press, in February, 1992, p.258～265) need satisfy Allen quadrature criterion as the Blass multiple beam forming network, and structure is complicated, and the Blass multiple beam forming network of Unit 6 four wave beams needs 24 directional couplers.Fig. 1 is the schematic diagram of Bulter Unit 4 four beam-forming networks.L1, L2, R1, R2 are wave beam, and V1, V2 are-45 ° of phase shifters, and D1, D2, D3, D4 are the 3dB directional coupler, and Y1, Y2, Y3, Y4 are antenna array unit.The Bulter multiple beam forming network exists the phase shift saltus step problem that is difficult to overcome, and as shown in Figure 1, the output phase shift of wave beam L2 is [135 °, 0 °, 225 °, 90 °], and the centre has very significantly that the phase shift knock-on becomes.

The purpose of this utility model is to provide a kind of principle simple, does not have the multiple beam forming network device that mainly is made of power division/synthesizer of phase shift saltus step and the strict linear gradient of phase shift.

The utility model comprises B 1 fen N road power divider, and 1 power combiner is closed on N * B phase shifter and N B road, and wherein B is a numbers of beams, and N is the antenna array unit number; CF signal was divided into N road signal through 1 minute behind the power divider of N road, each road signal is through arriving the input that 1 power combiner is closed on corresponding B road behind the phase shifter of appointment, the phase shift value that phase shifter produced that the N road signal that same power divider is told passes through is a linear gradient, and signal closes 1 power combiner through the B road at last and outputs to the scanning that the corresponding antenna arrays column unit forms wave beam.

In order to realize the purpose of this utility model better, can between closing the input of 1 power combiner, the phase shifter in the signal that each road is told and B road add an isolator.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the schematic diagram of Bulter Unit 4 four beam-forming networks.

Fig. 2 is a schematic diagram of the present utility model.

As shown in Figure 2, this is the schematic diagram of one three unit four beam-forming network devices, B1, B2, B3, B4 are any CF signal, F1, F2, F3, F4 are one fen three-way power divider, and H1, H2, H3, H4 are three tunnel unification power combiners, and N1, N2, N3 are antenna array unit, for sake of convenience, with one tunnel CF signal B1 wherein is example, and E1, E2, E3 are phase shifters, and G1, G2, G3 are isolators.Be divided into three road signals behind the CF signal B1 process power divider F1, arrive the input of power combiner H1 behind first via signal process phase shifter E1 and the isolator G1, behind power combiner H1, output to antenna array unit N1 again; Arrive the input of power combiner H2 behind the second road signal process phase shifter E2 and the isolator G2, behind power combiner H2, output to antenna array unit N2 again; Arrive the input of power combiner H3 behind Third Road signal process phase shifter E3 and the isolator G3, behind power combiner H3, output to antenna array unit N3 again, signal can produce wave beam after the antenna array unit emission scanning.At this, the phase shift value of phase shifter E1 is 0, the phase shift value of phase shifter E2 is α, the phase shift value of phase shifter E3 is 2 α, therefore CF signal B1 is [0, α, 2 α] in the signal phase shift of antenna array unit output in theory, processing procedure and the B1 of CF signal B2, B3, B4 are similar, can produce multi-beam after the antenna array unit emission.According to the principle of Fig. 2, if design a N unit B beam-forming network, we can close 1 power combiner and N * B constructs this network to the phase shifter isolator with B 1 fen N road power divider and N B road.

The utility model principle and simple structure, cost is low, as seen from Figure 2, CF signal is strict linear change through the multiple beam forming network device in the signal phase shift of antenna array unit output, do not produce the saltus step of phase shift, in addition, because the main member of this multiple beam forming network device is power division/synthesizer, so can select corresponding power allocation/synthesizer to construct suitable multiple beam forming network easily according to the design parameter and the numbers of beams of aerial array, for example to construct the beam-forming network of one four unit six wave beams, can construct with six one fen No. four power dividers and four six tunnel unification power combiner and the 24 pairs of corresponding phase shifters and isolator, this makes the design of phased array antenna have great flexibility.

Claims

1. multiple beam forming network device is characterized in that: comprise B 1 fen N road power divider, 1 power combiner is closed on N * B phase shifter and N B road; CF signal was divided into N road signal through 1 minute behind the power divider of N road, each road signal is through arriving the input that 1 power combiner is closed on corresponding B road behind the phase shifter of appointment, the phase shift value that phase shifter produced that the N road signal that same power divider is told passes through is a linear gradient, and signal closes 1 power combiner through the B road at last and outputs to the scanning that the corresponding antenna arrays column unit forms wave beam.

2. a kind of multiple beam forming network device as claimed in claim 1 is characterized in that: in the signal that each road is told, close on phase shifter and B road also has an isolator between the input of 1 power combiner.