CN2758992Y

CN2758992Y - Apparatus for making three frequency channel signals into one channel

Info

Publication number: CN2758992Y
Application number: CN 200420102897
Authority: CN
Inventors: 黄友元; 宫超鹏; 刘宁
Original assignee: Mobi Antenna Technologies Shenzhen Co Ltd
Current assignee: Mobi Antenna Technologies Shenzhen Co Ltd
Priority date: 2004-12-17
Filing date: 2004-12-17
Publication date: 2006-02-15
Anticipated expiration: 2014-12-17

Abstract

The utility model discloses a three-frequency band signal combiner which comprises a box body and a cover plate, wherein a combining port, a PHS branch port, a WCDMA branch port and a WLAN branch port are arranged on the box body; a PHS filter is arranged between the PHS branch port and the combining port; a WCDMA duplexer is arranged between the WCDMA branch port and the combining port; the WCDMA duplexer comprises a WCDMA reception path filter and a WCDMA emitting path filter which are in parallel connection with each other; a WLAN filter is arranged between the WLAN branch port and the combining port. The utility model with novel structure, compactness and small size simplifies a combining structure, solves the combining covering problem of PHS, WCDMA and WLAN frequencies, and ensures the isolation of a PHS system, a WCDMA system and a WLAN system when system distribution is carried out in a common room.

Description

Three frequency band signals mixers

Technical field

Radio frequency and microwave that the utility model relates in a kind of wireless communication field close the road device, relate in particular to a kind of three frequency band signals mixers.

Background technology

In the wireless telecommunications system device,, will need to use its corresponding apparatus device according to different frequency allocation situation.Many times not only need these products commonly used of filter and duplexer, also need some combiner device.

Mixer is divided into frequency mixer and power mixer.---its function of frequency mixer is that the signal of two or more different frequency ranges is lumped together, thereby reach the purpose of the only shared signal system of multiband in a building, that the frequency mixer can comprise is two-in-one, three-in-one, four unification mixers, even the signal frequency range of multichannel more can be merged into one tunnel mixer.

At present the frequency range of mobile communication mainly contains CDMA (825-835MHz/870-880MHz) and (1850-1910MHz/1930-1990MHz), GSM (890-915MHz/935-960MHz), DCS (1710-1785MHz/1805-1880MHz), Personal Handyphone System PHS (1900-1920MHz), and the primary band of 3G (1920-1980MHz/2110-2170MHz), also have WLAN (wireless local area network) WLAN (2400MHz-2500MHz) etc.

When each system works independently, generally use duplexer, filter just can satisfy system's needs.Yet sometimes, signal can be subjected to stopping of building and produce a lot of signal blind zones (dead space) in communication process, and this phenomenon will be more serious in building.In order to address this problem, indoor distributed system is widely used in building.But if need a cover indoor distributed system to consider, then just need a plurality of systems and exist simultaneously and could thoroughly deal with problems indoor by frequency band.But such design is not only damaged building, and increases operator's operation cost.Therefore, by the frequency mixer scheme that the signal of two or more frequencies passes through is widely adopted in indoor distributed system.

Be high-performance and the little requirement of volume of satisfying mixer, the general employing of prior art has the coaxial resonant cavity that carries, its Q value (quality factor of coaxial resonant cavity of carrying are arranged, quality factor) coaxial resonant cavity than no-load is little, and the height of Q value is directly proportional with the performance of filter in cavity body filter, be that high more its performance of Q value is good more, but the size of cavity often is directly proportional with the Q value, therefore, high-performance and small size are conflicting often in cavity body filter, and contradiction how to handle performance and volume well becomes the problem of most critical in the mixer design of being made up of filter.

The utility model content

Problem to be solved in the utility model provides a kind of road of closing that can realize good isolation between PHS and 3G (WCDMA), WLNA frequency range and frequency, and the uplink and downlink signal that is distributed in a plurality of mobile communications networks is covered in the three little frequency band signals mixers of compact conformation, volume of a cover indoor distributed system.

The technical solution of the utility model is: three frequency band signals mixers comprise box body and cover plate, there is one to close the branch road port of the branch road port of road port, a PHS, a WCDMA and the branch road port of a WLAN on the box body, at the branch road port of PHS with close a PHS filter is arranged between the road port: at the branch road port of WCDMA with close a WCDMA duplexer is arranged between the road port, the WCDMA duplexer comprises WCDMA receive path filter and WCDMA transmission channel filter, and two-way filter is parallel to be connected; At the branch road port of WLAN with close a WLAN filter is arranged between the road port.

PHS filter, WCDMA receive path filter and WCDMA transmission channel filter, WLAN filter are coupling coaxial cavity filter.Coupling coaxial cavity filter mainly is made of some coaxial cavity resonators, is coupled by window between the adjacent cavity.These constitute the coaxial cavity bend alignment of filter or are in a zigzag arranges.PHS path filter, WCDMA receive path filter, WCDMA transmission channel filter, WLAN path filter adopt a plurality of coaxial cavities to connect as required respectively and a plurality of cross-couplings limit realizes, the WCDMA frequency range accept path filter and WLAN filter channel on a side of box body, the transmission channel filter of WCDMA frequency range and PHS filter channel are on the opposite side of box body.

Above-described coaxial cavity resonator is the circular cylindrical cavity that contains cylindrical resonant rod, and the resonant rod top is provided with shrinkage pool.On the cover board be provided with screw rod corresponding to each circular cylindrical cavity, stretch in the shrinkage pool at resonant rod top its lower end.

The beneficial effects of the utility model are: the utility model has been simplified and has been closed line structure, novel structure, compactness, volume are little, the frequency that has solved PHS and WCDMA and WLAN is closed the road covering problem, has guaranteed the isolation between system when shared indoor distributed system of PHS system and WCDMA system and wlan system.Above the control that outside the band of each passage, suppresses, the utility model adopts multiway intersection coupling (CROSS-COUPLE) technology to carry out emulation, design, guaranteeing that each passage inserts the satisfactory while of loss and realized again suppressing outside the high band, make the mutual interference reduction between each system arrive minimum degree.

Description of drawings

Fig. 1 is a principle schematic of the present utility model;

Fig. 2 is an internal structure schematic diagram of the present utility model;

Fig. 3 is the rearview of Fig. 2;

Fig. 4 is resonant rod described in the utility model and tuning screw-rod structure schematic diagram;

Fig. 5 is an exterior frontal view of the present utility model;

Fig. 6 is an external side view of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is a principle schematic of the present utility model.As shown in the figure, three frequency band signals mixers are four port organizations, are divided road port, WCDMA to divide road port and WLAN to divide road port and are closed road port and form by PHS.Divide road port and close between the road port it is continuous at PHS by one road PHS filter, divide road port and close between the road port at WCDMA and constitute a WCDMA duplexer by WCDMA receive path filter and WCDMA transmission channel filter, this two-way filter a shared WCDMA divide road port, and WLAN divides between road port and the mixer port and connected by one road WLAN filter.This four path filter of PHS and WCDMA and WLAN links to each other with the external world by the common road port that closes.

Fig. 2,3 is the box body inner structure schematic diagram in the utility model.Three frequency band signals mixers comprise a PHS filter and a WCDMA duplexer and a WLAN filter.Receive path (RX) and transmission channel (TX) with the WCDMA frequency range in the embodiment separate, and are divided into two-way filter.Wherein, the WCDMA frequency range accept passage, WLAN filter channel a side at box body 5, the transmission channel of WCDMA frequency range and PHS filter channel are on the opposite side of box body 5.PHS filter working frequency range: 1900-1915MHz; WCDMA duplexer receive path (RX) working frequency range: 1920-1980MHz; WCDMA duplexer transmission channel (TX) working frequency range: 2110-2170MHz; The working frequency range of WLAN filter is 2400-2500MHz.Shown in Fig. 2,3, three frequency band signals mixers are provided with 2,3,4 and one of three branch road ports and close road port 1 in box body 5 both sides, PHS, WCDMA and WLAN three road signals are respectively by port 2 and port 3 and port 4 inputs, and microwave closes the road signal by closing road port 1 output.The both sides up and down and the inside of box body 5 are provided with partition, altogether cavity are divided into four parts, are respectively two-way filter and the path filter of PHS and the path filter of WLAN of WCDMA.To have a public coaxial cavity 21 to be that PHS filter and WCDMA accept filter shared closing road port 1 place.13,14,15,16,17,18,19,20, be respectively the lead that each port joint inner core is connected with resonant rod.Closing road port 1 place, by the mutual phase place of suitable adjusting common port realize filter at the signal of different frequency section all in the good coupling of common port.Wherein the road port phase matched of closing of PHS filter is to adjust by the U molded lines 12 that is connected on the box side wall, and U molded lines 12 connects public coaxial cavity 21 and PHS filter channel.

Close road port 1 at mixer, the TX filter parallel connection of PHS filter and WCDMA comes a side of box body 5, the RX filter of WCDMA and the parallel connection of WLAN filter come on the opposite side of box body 5, and close signal that public port mutual phase place in road makes filter different frequency section by suitable adjusting and all reach good coupling closing road port 1.

Three frequency band signals mixers are provided with a branch road port that closes road port 1 and corresponding one by one PHS, WCDMA and WLAN, from closing road port 1, be divided into three branch lines with transmission line, have two branch lines to be connected with a coaxial cavity resonator of WCDMA transmission channel and WLAN passage respectively, another transmission branch line is connected WCDMA and accepts on the public coaxial cavity resonator of passage and PHS passage.Each coaxial cavity is adjacent cavity at least by window and is coupled.Filter is a coaxial cavity filter, and each filter and a branch road port join, and the public branch road port of the TX of WCDMA and RX filter has wherein constituted with this and to have closed line structure.

Among Fig. 2, Fig. 3, the signal flow of four path filters is to respectively shown in A, B, C, D.Groove 11 is the grooves in order to realize that the cross-couplings limit is opened between cavity.Using cross-linked purpose in cavity is in order to make PHS and WCDMA, three frequency ranges of WLAN reach better isolation, to make the inhibition of three road signals reach better.

Fig. 4 is resonant rod and the tuning screw-rod structure schematic diagram in the three frequency band signals mixers described in the utility model.As shown in Figure 4, the upper and lower surface of insulating course 50 all has resonant cavity 9 in the middle of the box body in box body 5, comprise cylindrical resonant rod 8 in the resonant cavity 9, resonant rod 8 tops are provided with shrinkage pool, and each resonant rod all is that correspondence is fixed on above the insulating course 50 at a resonant cavity center.

On

cover plate

6,7, all be provided with adjusting screw(rod) 10 corresponding to each resonant cavity in the box body, adjusting screw(rod) 10 is matched with the cover plate screw by screw and nut and constitutes, adjusting screw(rod) 10 is to fix on the cover board, and stretch in the shrinkage pool on resonant rod 8 tops in the resonant cavity its lower end.

Since input and output can reverse configuration in the different circuit of microwave frequency band, so this mixer also can be used as splitter, promptly, carry out shunt through this device by former output port 1 input, shunting sign is by

former input port

2,3,4 outputs, so just become splitter.

To sum up, adopt mixer described in the utility model, compared with prior art, this mixer adopts optimizes the coaxial cavity physical dimension, and by rational cross-couplings form, what solved PHS and WCDMA and wlan system closes the road covering problem, has guaranteed the isolation between system when shared indoor distributed system of PHS system and WCDMA system and wlan system.

Claims

1, a kind of three frequency band signals mixers, comprise box body and cover plate, there is one to close the branch road port of the branch road port of road port, a PHS, a WCDMA and the branch road port of a WLAN on the box body, it is characterized in that: the branch road port of described PHS and close a PHS filter is arranged between the road port; At the branch road port of WCDMA with close a WCDMA duplexer is arranged between the road port, described WCDMA duplexer comprises WCDMA receive path filter and WCDMA transmission channel filter, and two-way filter is parallel to be connected; The branch road port of WLAN and close a WLAN filter is arranged between the road port.

2, three frequency band signals mixers as claimed in claim 1 is characterized in that: described PHS filter, WCDMA receive path filter and WCDMA transmission channel filter, WLAN filter are coupling coaxial cavity filter.

3, three frequency band signals mixers as claimed in claim 2, it is characterized in that: described coupling coaxial cavity filter mainly is made of at least more than one coaxial cavity resonator, described coaxial cavity resonator is in a zigzag or bend alignment, is coupled by window between the adjacent cavity.

4, three frequency band signals mixers as claimed in claim 3, it is characterized in that: described coaxial cavity resonator is the circular cylindrical cavity that includes cylindrical resonant rod, described resonant rod top is provided with shrinkage pool, be provided with screw rod corresponding to each circular cylindrical cavity on the described box body, stretch in the shrinkage pool at resonant rod top described screw rod lower end.