CN107508025A

CN107508025A - A kind of group delay modulator

Info

Publication number: CN107508025A
Application number: CN201710782966.9A
Authority: CN
Inventors: 林先其; 陈哲; 彭皎; 唐聪; 江源; 苏洪; 苏一洪; 庞平; 樊勇
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2017-09-03
Filing date: 2017-09-03
Publication date: 2017-12-22

Abstract

The invention discloses a kind of group delay modulator, resistance R1, electric capacity C1 and inductance L1 including forming first order resonator, form first resistor R21, second resistance R22, electric capacity C2 and the inductance L2 of second level resonator, resistance R3, the electric capacity C3 and inductance L3 of third level resonator are formed, is parallel-connected to before and after the first order resonator, second level resonator and third level resonator in imput output circuit.By adjusting C1, L1, C2, L2, C3 and L3, three discrete passband windows can be obtained, obtain three group delays of different sizes, realize that group delay regulates and controls.The present invention can be used for the theory analysis design of group delay in various electronic instruments and communication system, and its advantage is simple in construction, flexible design, and efficiency high, a variety of group delays, which regulate and control, easily to be realized by multistage LC in parallel cascaded structure.

Description

A kind of group delay modulator

Technical field

The invention belongs to microwave and millimeter wave Circuits and Systems field, is related to a kind of group delay modulator.

Background technology

In the transmit process of signal, essential meeting produces regular hour delay, and generally use group delay weighs Measure time delay.In many actual signal processing applications, the group delay of one non-stationary process of estimation is one important Work.As long as there is relative motion between system and echo signal, Doppler effect there is, and also there is group delay.And during group Prolong control technique to be always widely used in various electronic instruments and communication system, by group delay device, input can be believed Exported after number one section of special time of delay, and then the Special controlling of complete pair signals.

Simplest microwave/millimeter wave group delay device is exactly the transmission line of one section of length-specific, as microstrip line, coaxial line, Rectangular waveguide etc., for reduce size, increase group delay modification scope, developed again it is various based on coupling line, reflection electric circuit with And the compact group delay device of resonance structure etc..For example Bi Danhong et al. devises a kind of group delay of microwave one port network (see the group delay research [J] of the grand microwaves one port networks of Bi Dan, electronics technology periodical, 2012.), for single port microwave network The group delay characteristic of network, the relation between S parameter and resonator quality factor in group delay characteristic is analyzed, but it simply analyzes list The group delay of port, there is certain limitation.

Make a general survey of domestic and international correlative study dynamic to understand, small integrated, a wide range of, broadband or the regulation and control of multiband group delay are real It is now its Developing mainstream.For example Shulabh Gupta et al. propose a kind of transmission any group delay of line generalization with bending Method is (see Shulabh Gupta, Armin Parsa, and Christophe Caloz.Group-Delay Engineered Noncommensurate Transmission Line All-Pass Network for Analog Signal Processing[J].IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES,2010, VOL.58, NO.9.), delay is produced using one section of microstrip line, any type is integrated by controlling the length of different microstrip lines Group delay, but need to be optimized with algorithm, efficiency comparison is low, it is difficult to efficient comprehensive Design group delay.

The content of the invention

It is an object of the invention to overcome above-mentioned the shortcomings of the prior art, there is provided a kind of group delay modulator, pass through The method that transmission zero is introduced in passband is transmitted, it is reasonable to design dead-center position, pass band width is controlled, can efficiently integrate and set Count group delay modulator.

To achieve these goals, the technical scheme is that：

A kind of group delay modulator, including resistance R1, electric capacity C1 and the inductance L1 of first order resonator are formed, form second First resistor R21, second resistance R22, electric capacity C2 and the inductance L2 of level resonator, form resistance R3, the electricity of third level resonator Hold C3 and inductance L3, it is defeated that input is parallel-connected to before and after the first order resonator, second level resonator and third level resonator Go out in circuit.

First order resonator is in series by resistance R1, electric capacity C1 and inductance L1；Second level resonator is first by first resistor R21 and electric capacity C2, second resistance R22 and inductance L2 are in parallel again after connecting respectively to be formed；Third level resonator is by resistance R3, electric capacity C3 and inductance L3 are in series；By adjusting C1, L1, C2, L2, C3 and L3, three discrete passband windows can be obtained, are obtained The group delay of different sizes to three, realize group delay master regulation, and have between three discrete passband windows two it is adjustable The zero point of section；The differential loss value of different passband windows can be obtained by adjusting R1, R21, R22 and R3, and then to three sizes Different group delays are finely adjusted.

The advantages of the present invention:

(1) present invention designs group delay modulator by the way of equivalent-circuit model, and its is simple in construction, is easy to efficiently comprehensive Close design group delay.

(2) present invention by changing capacitor and inductor value, is adjusted the position of transmission zero, realized using lamped elements such as RLC Group delay regulates and controls, and flexible design is convenient.

The purpose of the present invention, feature and advantage will make explanation further below referring to the drawings in conjunction with the embodiments.

Brief description of the drawings

Fig. 1 is the structural representation of group delay modulator provided by the invention.

Fig. 2 is the effect diagram of group delay modulator provided by the invention.

Embodiment

As shown in figure 1, a kind of group delay modulator, including form resistance R1, electric capacity C1 and the inductance of first order resonator L1, first resistor R21, second resistance R22, electric capacity C2 and the inductance L2 of second level resonator are formed, form third level resonator Resistance R3, electric capacity C3 and inductance L3, before and after the first order resonator, second level resonator and third level resonator it is in parallel even It is connected in imput output circuit.

As an example, a kind of simulated design of group delay modulator.R1=R21=R22=R3=0.1 Ω are chosen to come Instead of the loss of whole circuit, C1=5pF, L1=5nH, C2=30pF, L2=1nH, C3=2pF and L3=20nH are taken, is held Mouth impedance takes the in parallel of 50 Ω, C2 and L2 to form a passband, and L1, C1 series connection and L3, C3 series connection are in parallel with C2 and L2 again, Two adjustable zero points can be introduced in passband both sides, pass through regulation, C2, L2, C3 and L3 value, the position of two zero points of control Put, and then change the bandwidth of passband, reach the purpose of group delay regulation and control.Effect is as shown in Fig. 2 obtained the group delay of convex.

Further, extra L, C in parallel series connection in circuit, i.e., introduce extra zero point in passband, and increase is discrete The quantity of passband, you can realize the regulation and control of more multiband group delay.

One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair Bright principle, it should be understood that protection scope of the present invention is not limited to such especially statement and embodiment.This area Those of ordinary skill can make the various other various tools for not departing from the present invention according to these technical inspirations disclosed by the invention Body deforms and combination, and these deformations and combination are still within the scope of the present invention.

Claims

A kind of 1. group delay modulator, it is characterised in that：Resistance R1, electric capacity C1 and inductance including forming first order resonator L1, first resistor R21, second resistance R22, electric capacity C2 and the inductance L2 of second level resonator are formed, form third level resonator Resistance R3, electric capacity C3 and inductance L3, before and after the first order resonator, second level resonator and third level resonator it is in parallel even It is connected in imput output circuit.
2. group delay modulator according to claim 1, it is characterised in that：Described first order resonator by resistance R1, Electric capacity C1 and inductance L1 are in series；Described second level resonator is first by first resistor R21 and electric capacity C2, second resistance R22 It is in parallel again after being connected respectively with inductance L2 to form；Described third level resonator is by resistance R3, electric capacity C3 and inductance L3 series connection structure Into.
3. group delay modulator according to claim 1, it is characterised in that：Described resistance R1, R21, R22, R3 value Scope is 0-30 ohms, and regulation R1, R21, R22, R3 value realizes the fine setting control of group delay；Described electric capacity C1, C2, C3 and electricity Sense L1, L2, L3 span are determined by required frequency range, adjust electric capacity C1, C2, C3 and inductance L1, L2, L3 value and two Two ratios realize the master regulation of group delay.