CN202172114U

CN202172114U - Broadband double-frequency combiner

Info

Publication number: CN202172114U
Application number: CN2011202763983U
Authority: CN
Inventors: 郑进喜; 郑姗姗; 刘钧; 韩敏
Original assignee: NANJING GUANGSHUN NETWORK COMMUNICATION CO Ltd
Current assignee: NANJING GUANGSHUN NETWORK COMMUNICATION CO Ltd
Priority date: 2011-08-01
Filing date: 2011-08-01
Publication date: 2012-03-21
Anticipated expiration: 2021-08-01

Abstract

The utility model discloses a broadband double-frequency combiner, which comprises a cavity body (1) and a cover plate (2) arranged on the cavity body (1). Two filters, namely a 550-750MHz low-pass filter and a 1710-2700MHz band-pass filter are arranged in the cavity body (1), and the two filters are separated by a partition wall. Three connectors arranged outside the cavity body (1) are respectively a 550-750MHz low-pass filter port (3), a 1710-2700MHz band-pass filter port (4) and a public port (5), wherein the 550-750MHz low-pass filter port (3) and the 1710-2700MHz band-pass filter port (4) are respectively connected with corresponding input ends of the filters, the public port (5) is connected with both the output ends of the two filters, and a through groove is arranged on the partition wall at the connection position of the two filters to achieve coupling.

Description

A kind of broadband dual-frequency mixer

Technical field

The utility model is the network optimization product that belongs in electronic information and the mobile communication technology field, specifically is a kind of broadband dual-frequency mixer.

Background technology

550～750MHz network signal is the descending digital communication channel of cable TV, is used for the transmission of digital radio and television.1710～2700 MHz network signals are the summation of DCS1800 system, 3G system, wlan system and LTE system frequency.Wherein, DCS1800 full name is: DigitalCellularSystemat1800MHz; The Chinese implication is the 1800MHz Digital Cellular System, and China's mobile communication undergoes an unusual development rapidly, on the one hand because the restriction of 900MHz frequency resource; Phenomenons such as frequency resource is nervous, channel is not enough, and traffic density is excessive have appearred in some areas; Utilize technology such as multiple frequency multiplex mode, multilayer covering, frequency hopping to come the increase capacity on the other hand, also have many limitations.Have only and carry out traffic through the DCS1800 net and share, could thoroughly address the above problem.

3G full name is: 3rd Generation, Chinese implication is for just being meant third generation digital communication.With the main distinction in preceding two generations are the liftings on the speed of transmission voice and data; It can realize seamless roam in the world better; And handle multiple media formats such as image, music, video flowing; Multiple information services such as comprising web page browsing, videoconference, ecommerce is provided, also will considers favorable compatibility simultaneously with existing second-generation system.For this service is provided; Wireless network must can be supported different data transmission baudss, that is to say in the environment of indoor, outdoor and driving to support the transmission speed of 2Mbps (megabit/per second), 384kbps (kilobit/per second) and 144kbps at least respectively.

WLAN is WLAN (Wireless Local Area Network); Be meant the LAN of making transmission medium with wireless channel; Be the important supplement and the extension of wired networking mode; And become vital part in the computer network gradually, adaptable across needing removable data to handle the field that maybe can't carry out the physical transmission medium wiring.Its frequency is 2400-2500MHz.

LTE is the abbreviation of English Long Term Evolution.LTE has the data download capabilities of 100Mbps also by the popular 3.9G that is called, and is regarded as the mainstream technology to 4G evolution from 3G.Mixer is mainly as the multisystem signal being closed road to cover indoor distributed system.In practical applications, need be with 550～750MHz network signal and 1710～2700 MHz network signals, two kinds of frequencies are closed road output.Adopt mixer, a cover indoor distributed system is worked in the multiple systems frequency range simultaneously.

The utility model content

The utility model technical problem to be solved provides a kind of broadband dual-frequency mixer that the signal of cable television system, DCS1800 system, 3G system, wlan system and LTE system is combined.

The described broadband dual-frequency mixer of the utility model; Comprise the cover plate on cavity and the cavity; Inside cavity is provided with two filters, is respectively 550～750 MHz low pass filters and 1710～2700 MHz band pass filters, separates through partition wall between two filters; Three are arranged on the outside joint of cavity is respectively 550～750 MHz low pass filter ports, 1710～2700 MHz band pass filter port and public ports; Wherein 550～750 MHz low pass filter ports, 1710～2700 MHz band pass filter ports connect with above-mentioned corresponding filter input end respectively; Public port is connected with the output of above-mentioned two filters jointly, and the partition wall of two filters in this junction has groove realization coupling.

Said 550～750 MHz low pass filters comprise that one is arranged on first groove in the cavity, a medium tube, a low pass conductor and a transmission line; Wherein the low pass conductor penetrates in the medium tube; Medium tube is installed in the groove; One end of low pass conductor directly is connected with 550～750 MHz low pass filter ports, and the other end is connected with public port through transmission line.The low pass conductor is made up of the impedance line that 11 septa intersegmentals are provided with, and wherein 6 joints are low-impedance line, and 5 joints are the high impedance line.Transmission line is that silver-plated conductor is fixed on low pass conductor and the joint with scolding tin.

Said 1710～2700 MHz band pass filters comprise second groove that is arranged in the cavity; 9 resonant rods that link to each other successively are located in second groove; I.e. first resonant rod to the, nine resonant rods; Wherein first resonant rod is connected with 1710～2700 MHz band pass filter ports through first coupling conductors, and the 9th resonant rod is connected with transmission line through second coupling conductors, is connected with public port through transmission line again.Directly connect between two resonant rods, coupling conductors is that silver-plated plates are fixed on resonant rod and the joint with scolding tin.Transmission line is that silver-plated conductor is fixed on low pass conductor and the joint with scolding tin.

The form that the utility model adopts low pass filter to combine with band pass filter, use the filter basic principle with the Design of Filter that is applicable to 550～750MHz, 1710～2700 MHz network signals respectively on same cavity.Adopt aluminum to be processed into cavity, copper product is processed into conductor, and leads silver-plated technical finesse in the utilization of inside cavity surface, and power can be reached more than the 200W.Extensively from 550MHz to 2700MHz, two kinds of mutual isolations of network signal all reach more than the 80dB the utility model covering frequence, have fabulous response forms; And it is high that the technical indicator band suppresses outward; Insertion Loss is little, volume is little, be convenient to Installation and Debugging, improves the performance of whole system, strengthens the reliability of network; Simplify the multisystem covering preferably, and be more suitable for the engineering construction application.Be that a kind of volume is little, in light weight, low, the high-power communication network equipment of cost.

Description of drawings

Fig. 1 is the planar structure sketch map of the utility model cavity,

Fig. 2 is the left view of the utility model,

Fig. 3 is the right view of the utility model.

Embodiment

The utility model adopts lumped parameter and distributed constant principle, according to technical indicator, in conjunction with Chebyshev's type Design of Bandpass principle.

Like Fig. 2 and shown in Figure 3, whole mixer has three joints, is respectively 550～750 MHz low pass filter ports, 3,1710～2700 MHz band pass filter port 4 and public ports 5.Wherein:

550～750 MHz low pass filter ports 3 are connected in public port 5 through low pass conductor 7 through transmission line 8.1710～2700 MHz band pass filter ports 4 connect and access public port 7 through second coupling conductors 20 through first resonant rod, 10 to the 9th resonant rods 18.In network optimization compartment system, use this mixer; Can make CDMA, GSM, 3G and wlan system share the same antenna; The signal that comes out respectively from a plurality of system base-stations gets into 550～750 MHz low pass filter ports 3 or 1710～2700 MHz band pass filter ports 4 of mixer separately, and the filter through separately closes the road to public port 5 again.

Like Fig. 1, inside cavity is provided with two filters, is respectively 550～750MHz low pass filter and 1710～2700 MHz band pass filters.

550～750 MHz low pass filters comprise that one is arranged on first groove 6 in the cavity, medium tube 13, a low pass conductor 7 and a transmission line 8; Wherein low pass conductor 7 penetrates in the medium tube 13; Medium tube 13 is installed in the groove 6; One end of low pass conductor directly is connected with 550～750 MHz low pass filter ports 3, and the other end is connected with public port 5 through transmission line 8.Low pass conductor 7 is made up of 11 joint impedance lines, and wherein 6 joints are low-impedance line, and 5 joints are the high impedance line.Transmission line 8 is that silver-plated conductor is fixed on low pass conductor 7 and the joint with scolding tin.

1710～2700 MHz band pass filters comprise second groove 9 that is arranged in the cavity; 9 resonant rods 10 ~ 18 that link to each other successively are located in second groove; I.e. first resonant rod, 10 to the 9th resonant rods 18; Wherein first resonant rod 10 is connected with 1710～2700 MHz band pass filter ports 4 through first coupling conductors 19, and the 9th resonant rod 18 is connected with transmission line 8 through second coupling conductors 20, is connected with public port 5 through transmission line 8 again.

Claims

1. broadband dual-frequency mixer; It is characterized in that comprising the cover plate (2) on cavity (1) and the cavity (1); Cavity (1) inside is provided with two filters, is respectively 550～750 MHz low pass filters and 1710～2700 MHz band pass filters, separates through partition wall between two filters; Three are arranged on the outside joint of cavity (1) is respectively 550～750 MHz low pass filter ports (3), 1710～2700 MHz band pass filter ports (4) and public port (5); Wherein 550～750 MHz low pass filter ports (3), 1710～2700 MHz band pass filter ports (4) connect with above-mentioned corresponding filter input end respectively; Public port (5) is connected with the output of above-mentioned two filters jointly, and the partition wall of two filters in this junction has groove realization coupling.

2. broadband dual-frequency mixer according to claim 1; It is characterized in that said 550～750 MHz low pass filters comprise first groove (6), a medium tube (13), a low pass conductor (7) and a transmission line (8) that is arranged in the cavity; Wherein low pass conductor (7) penetrates in the medium tube (13); Medium tube (13) is installed in the groove (6); One end of low pass conductor directly is connected with 550～750 MHz low pass filter ports (3), and the other end is connected with public port (5) through transmission line (8).

3. a kind of broadband dual-frequency mixer according to claim 2, low pass conductor (7) is made up of the impedance line that 11 septa intersegmentals are provided with, and wherein 6 joints are low-impedance line, and 5 joints are the high impedance line.

4. according to claim 1,2 or 3 described broadband dual-frequency mixers; It is characterized in that said 1710～2700 MHz band pass filters comprise second groove (9) that is arranged in the cavity; 9 resonant rods (10 ~ 18) that link to each other successively are located in second groove; Promptly first resonant rod (10) is to the 9th resonant rod (18); Wherein first resonant rod (10) is connected with 1710～2700 MHz band pass filter ports (4) through first coupling conductors (19), and the 9th resonant rod (18) is connected with transmission line (8) through second coupling conductors (20), is connected with public port (5) through transmission line (8) again.