CN201804991U - In-phase continuous adjustable power distributor - Google Patents

Abstract

The utility model relates to an in-phase continuous adjustable power distributor. The distributor comprises a 3dB coupler AB1, a differential phase shifter A2, a mechanical phase shifter A1, a tee joint X1 and a short circuit piston I, wherein one port of the tee joint X1 is connected with the short circuit piston I through a cable, and the other two ports of the tee joint X1 are connected with the differential phase shifter A2 and the 3dB coupler AB1 sequentially through the mechanical phase shifter A1 which is connected with the cable. The in-phase continuous adjustable power distributor has the characteristics that the problem of phase variation of two paths of radio frequency signals when the power distribution ratio is adjusted can be solved, so that the power proportion can be adjusted conveniently without considering phase issues, such as an instrument landing antenna feeder unit which has steady requirements on power and phase of each distributed port, i.e. in an equipment flight calibration process, the power of a radio frequency signal of a certain port needs to be adjusted, meanwhile, the phase cannot be changed, thus, the in-phase continuous adjustable power distributor can be applied to adjust conveniently. The in-phase continuous adjustable power distributor can be used in a system requiring both radio frequency phase relationship and continuous power adjustability.

Description

The continuous power-adjustable distributor of same-phase

Technical field

The utility model relates to a kind of assembly that is applied to the radio frequency distribution network, particularly a kind of power divider that is used for, the continuous power-adjustable distributor of the same-phase of Radio Frequency Surveillance hybrid network.

Background technology

Power-adjustable distributor in the past adopts the match reactance element (as inductance) of regulating terminal more, make the impedance variation on each road realize the purpose of power division, but the radio-frequency (RF) phse with the adjustment two ends of power proportions also changes thereupon, if there is requirement in system to phase place, then also need to add the device of adjusting phase place, make troubles to debugging.

Summary of the invention

In view of the deficiency that prior art exists, the utility model provide a kind of can be easily to the power proportions adjustment, and needn't consider the continuous power-adjustable distributor of same-phase of phase problem.

The utility model for achieving the above object, the technical scheme of being taked is: the continuous power-adjustable distributor of a kind of same-phase, it is characterized in that: comprise three-dB coupler AB1, differential phase shifter A2, mechanical phase shifter A1, threeway X1 and short-circuit plunger I, the port of described threeway X1 meets short-circuit plunger I by cable, and two ports of threeway X1 are connected with differential phase shifter A2 and three-dB coupler AB1 successively by the mechanical phase shifter A1 that is connected with cable.

Characteristics of the present utility model are: the phase change problem that has solved two-way radiofrequency signal when regulating power-division ratios, can be easily to the power proportions adjustment, and needn't consider phase problem, antenna feeder allocation units as the instrument landing, all there is fixing requirement this unit to the power and the phase place of each port of being distributed, and the equipment school is being flown in the journey, need adjust the power of the radiofrequency signal of a certain port, simultaneously can not change phase place, at this moment use the utility model and can easily adjust.The utility model is applicable to and not only requires the radio-frequency (RF) phse relation but also require in the adjustable system of continuous power.

Description of drawings

Fig. 1 is that circuit of the present utility model connects block diagram.

Embodiment

As shown in Figure 1, the continuous power-adjustable distributor of a kind of same-phase, comprise three-dB coupler AB1, differential phase shifter A2, mechanical phase shifter A1, threeway X1 and short-circuit plunger I, the port of threeway X1 is connected with cable one end connector, cable other end joint is connected with short-circuit plunger I interface, two ports of threeway X1 are connected with cable one end connector, cable other end joint is connected with the interface of mechanical phase shifter A1, and two interfaces in addition of electromechanical phase shifter A1 are connected with XS2, the XS3 mouth of three-dB coupler AB1 by cable respectively.

Because differential phase shifter A2 center socket to the cable length difference of the XS3 of three-dB coupler AB1 and XS2 mouth has determined the ratio of distributor two output voltage u1 and u4, so when mobile differential phase shifter A2 center socket, promptly change.Short-circuit plunger I and mechanical phase shifter A1 become 50 Ω with the input impedance matching at threeway X1 place.

If connect 50 Ω loads on the XS4 of three-dB coupler AB1 mouth, variable power divider function has only XS1 one tunnel output of three-dB coupler AB1 like this, and this moment, variable power divider function promptly became variable attenuator.The input vswr of variable power divider function≤1.10.

Operation principle

As can be seen from Figure 1, when being imported by mechanical phase shifter A1, input signal u can not cause very big reflection owing to impedance matches, so adopt single detail tuner to mate, its matching principle is to utilize the branch line reactance to produce a new reflection to offset the original caused reflection that do not match, (by threeway X1, short-circuit plunger I, mechanical phase shifter A1 and stube cable are formed).Matching principle is as follows, when 50 ohm of inputs, when load is non-50 ohm, removable short-circuit plunger I and mechanical phase shifter A1 select branch line apart from terminal apart from d and detail length L, can make the branch line back long lineman work at traveling-wave mode.

Signal after input matches enters differential phase shifter A2, because differential phase shifter A2 input areflexia after mating, and two outputs are 50 ohmages, so signal is divided into two parts in equal size and outputs to three-dB coupler AB1, shift to the knob of device A2 by adjusting difference, two phase of input signals that are input to three-dB coupler AB1 are changed, and the two-way input signal is:

$u1=v/\sqrt{2}(e^{j0}+e^{-j90+\mathrm{\α}})$

$u4=v/\sqrt{2}(e^{-j90}+e^{\mathrm{j\α}})$

The two-way power ratio is $u1/u4=\mathrm{tg}\left(\frac{90-\mathrm{\α}}{2}\right)$

The two-way phase place is $\mathrm{\Φ}1=\mathrm{\Φ}4=\frac{90+\mathrm{\α}}{2}$

The knob of regulating differential phase shifter just can change the α value and promptly change two-way power.

Claims (1)

1. continuous power-adjustable distributor of same-phase, it is characterized in that: comprise three-dB coupler AB1, differential phase shifter A2, mechanical phase shifter A1, threeway X1 and short-circuit plunger I, the port of described threeway X1 meets short-circuit plunger I by cable, and two ports of threeway X1 are connected with differential phase shifter A2 and three-dB coupler AB1 successively by the mechanical phase shifter A1 that is connected with cable.