CN207009624U

CN207009624U - A kind of ultrashort wave frequency band LC combiners

Info

Publication number: CN207009624U
Application number: CN201720935863.7U
Authority: CN
Inventors: 杨海兵; 宋永政
Original assignee: Henan Accurted Electronic Technology Co Ltd
Current assignee: Henan Accurted Electronic Technology Co Ltd
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2018-02-13
Anticipated expiration: 2027-07-31

Abstract

The utility model provides a kind of ultrashort wave frequency band LC combiners, simple in construction, performance indications are good, printed board can be adjusted flexibly as needed, is easy to the system integration.A kind of ultrashort wave frequency band LC combiners, including high-pass filtering circuit, low-pass filter circuit and low frequency leakage signal removing circuit, the output end of the high-pass filtering circuit is connected with the output end of low-pass filter circuit is used as common interface, the low frequency leakage signal removing circuit is connected with the input of low-pass filter circuit is used as low-pass signal interface, and the input of the high-pass filtering circuit is high communication number interface；The combiner designed using LC resolution elements, in light weight and space hold are small；The filter function of antenna form is replaced using circuit element, easy processing simple in construction, cost is low, it is often more important that, the stabilization of the stability and performance indications of circuit than mechanical organ.

Description

A kind of ultrashort wave frequency band LC combiners

Technical field

It the utility model is related to a kind of combiner, and in particular to a kind of ultrashort wave frequency band LC combiners.

Background technology

In ultra short wave communication frequency range, broadband radio is increasing, such as the communication station that working frequency is 30--512MHz.By It is too wide in working frequency range, cause the antenna of single form design, such as bipyramid, dipole, loading monopole etc. generally can not be complete Accomplish that index is optimal in frequency range, especially in the case of size-constrained, then the combined antenna of segment design is applied.

Conventional one kind 30-512MHz combined antennas, it uses two sections to be designed, and low-frequency range uses monopole antenna Form, working band are 30-88MHz；High band uses dipole or biconical antenna form, and working band is 108- 512MHz.Then the port of two antennas is synthesized by a port by combiner.

The combiner of the current frequency range is mainly designed using cavity, and dimensional weight is big, processing difficulties, is also unfavorable for sky Between the system integration under limited situation, limit the application of combined antenna to a certain extent.

The content of the invention

In view of the shortcomings of the prior art, the utility model provides a kind of ultrashort wave frequency band LC combiners, simple in construction, performance Index is good, printed board can be adjusted flexibly as needed, is easy to the system integration.

A kind of ultrashort wave frequency band LC combiners, it is characterised in that including high-pass filtering circuit, low-pass filter circuit and low frequency Leakage signal eliminates circuit, and the output end of the high-pass filtering circuit is connected with the output end of low-pass filter circuit to be connect as public Mouthful, the low frequency leakage signal removing circuit is connected with the input of low-pass filter circuit is used as low-pass signal interface, the height The input of bandpass filter circuit is high communication number interface；

Wherein, the high-pass filtering circuit includes inductance L7, the electricity being sequentially connected in series from high communication number interface to common interface The common port for feeling L6, inductance L5 and inductance L4, the inductance L7 and inductance L6 is grounded through electric capacity C13；The inductance L6 and inductance L5 common port is grounded through electric capacity C11；The common port of the inductance L5 and inductance L4 are grounded through electric capacity C9；The inductance L4 and public affairs The common port of interface is connected with Current Limiting Diodes D1 positive pole altogether, the negative pole ground connection of the Current Limiting Diodes D1；

The low-pass filter circuit include be sequentially connected in series from low-pass signal interface road common interface electric capacity C1, electric capacity C3, Electric capacity C5, electric capacity C7, the electric capacity C1 and electric capacity C3 common port are grounded through inductance L1；The electric capacity C3's and electric capacity C5 is public End is grounded through inductance L2；The common port of the electric capacity C5 and electric capacity C7 are grounded through inductance L3；

The low frequency leakage signal removing circuit includes inductance L8, the electricity being sequentially connected in series from low-pass signal interface to earth terminal The common port for feeling L8 and resistance R1, the inductance L8 and inductance L9 is grounded through electric capacity C15；The inductance L9's and resistance R1 is public End is grounded through electric capacity C17.

More preferably to realize the utility model, may further be：The electric capacity C13, electric capacity C11, electric capacity C9, electric capacity C1, On electric capacity C3, electric capacity C5, electric capacity C7, electric capacity C15 and electric capacity C17, shunt capacitance C14, electric capacity C12, electric capacity are corresponded respectively C10, electric capacity C2, electric capacity C4, electric capacity C6, electric capacity C8, electric capacity C16 and electric capacity C18.

The beneficial effects of the utility model：The combiner designed using LC resolution elements, in light weight and space hold are small；Profit Replace the filter function of antenna form with circuit element, easy processing simple in construction, cost is low, it is often more important that, the stabilization of circuit The stabilization of property and performance indications than mechanical organ.

Brief description of the drawings

Fig. 1 illustrates circuit diagram of the present utility model；

Fig. 2 illustrates the parameter table of an element in the utility model；

Fig. 3 illustrates high-pass filtering circuit test chart in the utility model.

Embodiment

The utility model is elaborated below in conjunction with the accompanying drawings.

As shown in figure 1, a kind of ultrashort wave frequency band LC combiners, including high-pass filtering circuit, low-pass filter circuit and low frequency Leakage signal eliminates circuit, and the output end of the high-pass filtering circuit is connected with the output end of low-pass filter circuit to be connect as public Mouthful, the low frequency leakage signal removing circuit is connected with the input of low-pass filter circuit is used as low-pass signal interface, the height The input of bandpass filter circuit is high communication number interface；

In addition, in the electric capacity C13, electric capacity C11, electric capacity C9, electric capacity C1, electric capacity C3, electric capacity C5, electric capacity C7, electric capacity C15 On electric capacity C17, shunt capacitance C14, electric capacity C12, electric capacity C10, electric capacity C2, electric capacity C4, electric capacity C6, electric capacity are corresponded respectively C8, electric capacity C16 and electric capacity C18.

In the present embodiment, as shown in figure 1, Port1 mouths are common port；

Port2 mouths are 108-512MHz interfaces, as shown in Fig. 2 filtering test charts, electric capacity C7/ electric capacity C8/ inductance L3/ electricity Hold C5/ electric capacity C6/L2/ electric capacity C3/ electric capacity C4/ inductance L1/ electric capacity C1/ electric capacity C2 form one it is multistage, cut-off frequency is 108MHz high-pass filter,

Port3 mouths are 30-88MHz wave filter interfaces, as Fig. 3 filtering test chart shown in, Current Limiting Diodes D1 inductance L4 Electric capacity C9 electric capacity C10 inductance L5 electric capacity C11 electric capacity C12 inductance L6 electric capacity C13 electric capacity C14 inductance L7 composition more than one Rank, cut-off frequency is 88MHz low pass filter,

Inductance L8/ electric capacity C15/ electric capacity C16/ inductance L9/ electric capacity C17/ electric capacity C18/ resistance R1 is used to eliminate low-frequency range Leakage signal, increase interport isolation.

Wherein, the electric capacity being related in the present embodiment is using ATC 100B series；The inductance being related to using diameter 1mm or 0.8mm silver-coated copper wire coiling, to improve power capacity；Printed board uses common high frequency FR4 sheet materials, dielectric constant 4.2, thickness 2mm；Port mouths are SMA forms.

The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model Claimed scope is by appended claims and its equivalent thereof.

Claims

1. a kind of ultrashort wave frequency band LC combiners, it is characterised in that let out including high-pass filtering circuit, low-pass filter circuit and low frequency Reveal signal removing circuit, the output end of the high-pass filtering circuit is connected with the output end of low-pass filter circuit to be connect as public Mouthful, the low frequency leakage signal removing circuit is connected with the input of low-pass filter circuit is used as low-pass signal interface, the height The input of bandpass filter circuit is high communication number interface；

Wherein, the high-pass filtering circuit include be sequentially connected in series from high communication number interface to common interface inductance L7, inductance L6, Inductance L5 and inductance L4, the inductance L7 and inductance L6 common port are grounded through electric capacity C13；The public affairs of the inductance L6 and inductance L5 End is grounded through electric capacity C11 altogether；The common port of the inductance L5 and inductance L4 are grounded through electric capacity C9；The inductance L4 and common interface Common port be connected with Current Limiting Diodes D1 positive pole, the negative pole of Current Limiting Diodes D1 ground connection；

The low-pass filter circuit includes electric capacity C1, electric capacity C3, the electric capacity being sequentially connected in series from low-pass signal interface road common interface C5, electric capacity C7, the electric capacity C1 and electric capacity C3 common port are grounded through inductance L1；The common port warp of the electric capacity C3 and electric capacity C5 Inductance L2 is grounded；The common port of the electric capacity C5 and electric capacity C7 are grounded through inductance L3；

The low frequency leakage signal removing circuit includes inductance L8, the inductance L8 being sequentially connected in series from low-pass signal interface to earth terminal With resistance R1, the common port of the inductance L8 and inductance L9 are grounded through electric capacity C15；The common port warp of the inductance L9 and resistance R1 Electric capacity C17 is grounded.

2. a kind of ultrashort wave frequency band LC combiners according to claim 1, it is characterised in that in the electric capacity C13, electric capacity On C11, electric capacity C9, electric capacity C1, electric capacity C3, electric capacity C5, electric capacity C7, electric capacity C15 and electric capacity C17, electricity in parallel is corresponded respectively Hold C14, electric capacity C12, electric capacity C10, electric capacity C2, electric capacity C4, electric capacity C6, electric capacity C8, electric capacity C16 and electric capacity C18.