CN2247912Y

CN2247912Y - Multiple signal low-insertion loss mixer

Info

Publication number: CN2247912Y
Application number: CN 95237227
Authority: CN
Inventors: 李建新; 张建设; 梁君余
Original assignee: NANLING COMMUNICATION ELECTRONIC SYSTEM ENGRG CO ZHUHAI CITY
Current assignee: NANLING COMMUNICATION ELECTRONIC SYSTEM ENGRG CO ZHUHAI CITY
Priority date: 1995-07-15
Filing date: 1995-07-15
Publication date: 1997-02-19
Anticipated expiration: 2005-07-15

Abstract

The utility model adopts a plurality of filters as filtering elements of each path of television signals. Input terminals are independent with each other, and output terminals are corresponding to a plurality of input terminals which are respectively connected to a crossover frequency network; output terminals of the crossover frequency network form one path of output; the crossover frequency network is connected by adjustable resistant electronic elements. The utility model has favorable passband characteristic, can inhibit interference mixed wave and signal influence out of a plurality of channel passbands by using minimal attenuation, and is a good multiple signal low-insertion loss mixer.

Description

Multiple signals hang down the Insertion Loss blender

The utility model belongs to a kind of filtering blender.

The present multi-channel signal mixer that uses, Insertion Loss is comparatively serious, and along with the increase of port number, Insertion Loss is the trend that increases progressively step by step, thereby does not left in and apply.

The purpose of this utility model is to provide a kind of low Insertion Loss blender of multiple signals that can significantly reduce Insertion Loss.

The utility model is to adopt the filter element of a plurality of filters as every road TV signal, its input is independently of one another, its output correspondence a plurality of inputs of receiving respectively every the frequency network, becomes one tunnel output every the output of frequency network, is formed by connecting every the electronic component of frequency network by adjustable impedance.

Accompanying drawing 1 is the utility model electricity theory diagram.

Accompanying drawing 2 is the utility model embodiment electrical schematic diagram.

As Fig. 1, the utility model is to adopt a plurality of filter (Ch1, Chn) as the filter element of every road TV signal, its input (2) is independently of one another, its output (3) corresponding receive a plurality of inputs (5) respectively every frequency network (4), every output (6) Cheng Yilu of frequency network (4) output, be formed by connecting every the electronic component of frequency network (4) by adjustable impedance.

As Fig. 2, with filter (Ch1,, Chn) select screw-filter for use, select inductance for use every frequency network (4), variable capacitance is formed by connecting and is side, screw-filter (CH1, CHn) by inductance, electric capacity is linked to be, and its input (2) is independently of one another, its output (3) corresponding receive a plurality of inputs (5) respectively every frequency network (4), each input every frequency network (4) is all also followed an inductance (L1 respectively,, Ln), electric capacity (C1 ... Cn), electric capacity (C1 ..., other end ground connection Cn), inductance (L1,, other end Ln) also connects, again with after variable capacitance (Cn+1) is in parallel, become an output (6) output, the other end ground connection of variable capacitance (Cn+1).

The utility model can change the capacitance and the degree of coupling of each cavity by adjusting the adjustment screw on each filter, reaches the purpose that changes frequency bandwidth and resonance location, thereby makes blender have good pass-band performance; Special-purpose allotment every the frequency network is in the following ways: with certain channel coupling the time, remaining channel transfers to maximum off resonance state, channel mates one by one, so can suppress the outer interference noise of n channel passband and the influence of signal with minimum decay, be the low Insertion Loss blenders of a kind of good multiple signals.

Claims

1, the low Insertion Loss blender of a kind of multiple signals, it is characterized in that adopting the filter element of a plurality of filters as every road TV signal, its input is independently of one another, its output correspondence a plurality of inputs of receiving respectively every the frequency network, output every the frequency network becomes one tunnel output, is formed by connecting every the electronic component of frequency network by adjustable impedance.

2, multiple signals according to claim 1 hang down the Insertion Loss blender, it is characterized in that screw-filter (CH1 ..., CHn) by inductance, electric capacity is linked to be, its input (2) is independently of one another, its output (3) corresponding receive a plurality of inputs (5) respectively every frequency network (4), every each input of frequency network (4) respectively and then inductance (L1 ... Ln), an electric capacity (C1,, Cn), electric capacity (C1, Cn) other end ground connection, inductance (L1 ... Ln) the other end also connects, with after variable capacitance (Cn+1) is in parallel, become an output (6) output, variable capacitance (Cn+1) other end ground connection again.