CN201673991U

CN201673991U - CDMA/GSM/WLAN three-frequency mixer

Info

Publication number: CN201673991U
Application number: CN2010202095516U
Authority: CN
Inventors: 方绪; 谭英奎; 章海峰
Original assignee: NANJING SITANDE COMMUNICATION ENGINEERING Co Ltd
Current assignee: Nanjing Standard Communications Co.,Ltd.
Priority date: 2010-06-01
Filing date: 2010-06-01
Publication date: 2010-12-15
Anticipated expiration: 2020-06-01

Abstract

The utility model discloses a CDMA/GSM/WLAN three-frequency mixer, the cavity thereof is internally provided with three filters separated by partitions, four joints are respectively arranged outside the cavity, the CDMA filter, the GSM filter and the WLAN filter are respectively provided with independent output port, a public port is commonly connected with each filter output port, and the partitions at the connection positions of the three filters are provided with through groove for realizing coupling. The utility model adopts resonant cavity mode, utilizes the fundamental principle of the filter to design the cavity filters which are respectively suitable for the CDMA, GSM, and WLAN network signals on a same cavity. The utility has wide covering frequency, and the insulation of three network signals can reach more than 80dB.

Description

A kind of CDMA/GSM/WLAN tri-frequency combiner

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 CDMA/GSM/WLAN tri-frequency combiner.

Background technology

GSM full name is: Global System for Mobile Communications, Chinese implication is a global system for mobile communications, is commonly called as " Global Link ", is a kind of mobile communication technology standard that originates from Europe, is second generation mobile communication technology.

CDMA full name is: Code-Division Multiple Access, Chinese implication is a code division multiple access, is a kind of advanced person's of occurring in the digital mobile communication process in recent years radio spread spectrum communication technology.The speech coding technology that is provided among the CDMA, its communication quality is better than present GSM, and the noise of surrounding environment reduces can be user session the time, makes conversation more clear.

WLAN is WLAN (wireless local area network) (Wireless Local Area Network), be meant the LAN (Local Area Network) 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, needing to be widely used in removable data to handle the field that maybe can't carry out the physical transmission medium wiring.Its frequency is 2400-2500MHz.

In the networking process of moving communicating field, reduce the space in order to save cost, mixer is mainly as the multisystem signal being closed road to cover indoor distributed system.Therefore in CDMA, GSM and WLAN networking, tri-frequency combiner is indispensable device.

Summary of the invention

Moving the utility model is exactly in order to solve the problem of CDMA, GSM and three system group networks of WLAN, providing a kind of with CDMA, GSM and the tri-frequency combiner of wlan network traffic filter design on same cavity, is that the multiple network signal system is transmitted indispensable device.

CDMA described in the utility model, GSM and WLAN tri-frequency combiner, comprise the cover plate on cavity and the cavity, inside cavity is provided with three filters, be respectively the CDMA filter, GSM filter and WLAN filter, four joint CDMA ports, the GSM port, WLAN port and public port are separately positioned on the cavity outside, CDMA port wherein, the GSM port, the WLAN port respectively with the CDMA filter input end, the GSM filter input end, be connected with the WLAN filter input end, public port and CDMA filter output, the GSM filter output is connected jointly with the WLAN filter output, and the partition wall of three filters in this junction has groove realization coupling.

The CDMA filter comprises 7 resonant cavitys that link to each other successively, i.e. first to the 7th resonant cavity, a resonant rod has been installed in the center of each resonant cavity, and first resonant rod is connected with CDMA port and public port by coupled-wires respectively with last resonant rod.Coupling coefficient is controlled by window size between the adjacent resonators.And between first resonant cavity and the 3rd resonant cavity, perceptual cross-couplings device is installed between the 4th resonant cavity and the 6th resonant cavity.Coupled-wires is that silver-jacketed wire is fixed on resonant rod and the joint with scolding tin.Perception cross-couplings device is 2 installations tuning cross-lines on the cover board.

The GSM filter comprises 7 resonant cavitys that link to each other successively, i.e. the 8th to the 14 resonant cavity, a resonant rod has been installed in the center of each resonant cavity, and first resonant rod is connected with GSM port and public port by coupled-wires respectively with last resonant rod.Coupling coefficient is controlled by window size between the adjacent resonators.And between the 8th resonant cavity and the tenth resonant cavity, capacitive cross-couplings device is installed between the 11 resonant cavity and the 13 resonant cavity.Coupled-wires is that silver-jacketed wire is fixed on resonant rod and the joint with scolding tin.Capacitive cross-couplings device be 2 be fixed on cavity recessed poor in the tuning bar that flies.

The WLAN filter comprises a big groove, four resonant rods have been installed in the groove, first resonant rod is connected with WLAN port and public port by coupled-wires respectively with last resonant rod, and coupling coefficient is controlled by distance between the resonant rod between the adjacent resonant rod.Coupled-wires is that silver-jacketed wire is fixed on resonant rod and the joint with scolding tin.

The utility model adopts the resonant cavity form, is processed into cavity with aluminum, and in the technical finesse of inside cavity surface utilization electric conductive oxidation, does not need electroplate.And the WLAN filter adopts pectinate texture, has reduced process time again.Adopt above technology to make it in very narrow frequency range, accomplish very high isolation, and it is high that the technical indicator band suppresses outward, Insertion Loss is little, volume is little, be convenient to Installation and Debugging, improve the performance of whole system, strengthen the reliability of network, simplify the multisystem covering preferably, and be more suitable for the engineering construction application.It is little to make it become volume, in light weight, the communication network optimizing equipment that cost is low, practical.The utility model covering frequence is from 800MHz to 2500MHz, and three kinds of mutual isolations of network signal all reach more than the 80dB.

According to optimizing Principles of Network, technical indicator of the present utility model is:

Description of drawings

Fig. 1 is the planar structure schematic diagram of the utility model cavity;

Fig. 2 is the structural representation of this practical cavity side, and wherein Fig. 2 a is a left view, and Fig. 2 b is a right view.

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.See Fig. 1-2.The utility model comprises cavity 1, cover plate 2, and cavity 1 inside is provided with three by the separated filter of partition wall, is respectively CDMA filter, GSM filter and WLAN filter.

It is respectively CDMA port 3, GSM port 5, WLAN port 4 and public port 6 that whole mixer has four joints; CDMA port 3 is connected in public port 6 through first resonant cavity, 11 to the 7th resonant cavitys 17 by coupled-wires 9; GSM port 5 connects and access public port 6 by coupled-wires 9 through the 8th resonant cavity the 21 to the 12 resonant cavity 27; WLAN port 4 is connected in public port 6 through big groove 31 by coupled-wires 9.In network optimization compartment system, use this mixer, can make CDMA, GSM and wlan system networking, the signal that comes out respectively from the four systems base station enters CDMA port 3, GSM port 4, the WLAN port 5 of mixer separately, and the filter by separately closes the road to public port 6 again.

The CDMA filter comprises 7 resonant cavitys that link to each other successively, i.e. first resonant cavity, 11 to the 7th resonant cavitys 17, the resonant rod of resonant rod 7, the first resonant cavitys has been installed in the center of each resonant cavity and the resonant rod of the 7th resonant cavity is connected with CDMA port 3 and public port 6 by coupled-wires 9 respectively.Coupling coefficient is controlled by window 30 sizes between the adjacent resonators.And between first resonant cavity 11 and the 3rd resonant cavity 13, between the 4th resonant cavity 14 and the 6th resonant cavity 16 perceptual cross-couplings device 18 is installed.The tuning cross-line that perception cross-couplings device 18 is mounted on the cover plate.

The GSM filter comprises 7 resonant cavitys that link to each other successively, i.e. the 8th resonant cavity the 21 to the 14 resonant cavity 27, a resonant rod 7 has been installed in the center of each resonant cavity, the resonant rod of the 8th resonant cavity is connected with GSM port 5 and public port 6 by coupled-wires 9 respectively with the resonant rod of the 14 resonant cavity, and between the 8th resonant cavity 21 and the tenth resonant cavity 23, between the 11 resonant cavity 24 and the 13 resonant cavity 26 capacitive cross-couplings device 20 is installed.Capacitive cross-couplings device 20 be fixed on cavity recessed poor in the tuning bar that flies.

The WLAN filter is a big groove 31, four WLAN resonant rods 10 have been installed in the groove, first resonant rod is connected with WLAN port 5 and public port 6 by coupled-wires 9 respectively with last resonant rod, and coupling coefficient is controlled by distance between the resonant rod between the adjacent resonant rod.

Claims

1. CDMA/GSM/WLAN tri-frequency combiner, it is characterized in that: comprise the cover plate (2) on cavity (1) and the cavity (1), cavity (1) inside is provided with three by the separated filter of partition wall, be respectively the CDMA filter, GSM filter and WLAN filter, four joints are CDMA port (3), GSM port (5), WLAN port (4) and public port (6), be separately positioned on cavity (1) outside, CDMA port (3) wherein, GSM port (4), WLAN port (5) respectively with the CDMA filter input end, the GSM filter input end is connected with the WLAN filter input end, public port (6) and CDMA filter output, the GSM filter output is connected jointly with the WLAN filter output, and the partition wall of three filters in this junction has groove realization coupling.

2. CDMA/GSM/WLAN tri-frequency combiner according to claim 1, it is characterized in that: the CDMA filter comprises 7 resonant cavitys that link to each other successively, promptly first resonant cavity (11) is to the 7th resonant cavity (17), a resonant rod (7) has been installed in the center of each resonant cavity, the resonant rod of the resonant rod of first resonant cavity and the 7th resonant cavity is connected with CDMA port (3) and public port (6) by coupled-wires (9) respectively, and between first resonant cavity (11) and the 3rd resonant cavity (13), between the 4th resonant cavity (14) and the 6th resonant cavity (16) perceptual cross-couplings device (18) is installed.

3. CDMA/GSM/WLAN tri-frequency combiner according to claim 2 is characterized in that: perceptual cross-couplings device (18) is mounted in the tuning cross-line on the cover plate.

4. according to claim 1,2 or 3 described CDMA/GSM/WLAN tri-frequency combiners, it is characterized in that: the GSM filter comprises 7 resonant cavitys that link to each other successively, promptly the 8th resonant cavity (21) is to the 14 resonant cavity (27), a resonant rod (7) has been installed in the center of each resonant cavity, the resonant rod of the 8th resonant cavity is connected with GSM port (5) and public port (6) by coupled-wires (9) respectively with the resonant rod of the 14 resonant cavity, and between the 8th resonant cavity (21) and the tenth resonant cavity (23), between the 11 resonant cavity (24) and the 13 resonant cavity (26) capacitive cross-couplings device (20) is installed.

5. CDMA/GSM/WLAN tri-frequency combiner according to claim 4 is characterized in that: capacitive cross-couplings device (20) be fixed on cavity recessed poor in the tuning bar that flies.

6. according to claim 1,2 or 3 described CDMA/GSM/WLAN tri-frequency combiners, it is characterized in that: the WLAN filter is a groove (31), in the groove order linear array four WLAN resonant rods (10), two WLAN resonant rods (10) at groove two ends are connected with WLAN port (4) and public port (6) by coupled-wires (9) respectively.