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TX Cavity Combiner

Cavity combiner is a kind of antenna and feeder system equipment widely used in interphone communication relay stations and various special trunking communications base stations.

Classification:

Public Safety Trunking System

Key words:

Complete Equipment Series

Active Module Series

Passive Device Series

Antenna Series

Related Products

Product Description

Overview:

Cavity combiner is a kind of antenna and feeder system equipment widely used in interphone communication relay stations and various special trunking communications base stations. It can combine the transmission signals of multiple relay stations or multiple channel machines into one output port, and then transmit the signals through one antenna feed. This can not only reduce the number of antennas and feeders, but also save the engineering cost of tower erection

Product Features:

The combiner is made of high-quality copper profiles. The cavity has high Q value, low loss and good suppression. It can very well suppress the out-of-band noise and higher-order harmonics of the transmitter, improve the purity of the transmission spectrum, fundamentally improve the intermodulation interference problem that is difficult to solve in the multi-antenna installation, and reduce the requirements for adjacent channel spacing. The minimum spacing can reach 150KHz.
The tuning pole is made of invar alloy with ultra-low expansion coefficient. The expansion coefficient changes little in the range of - 100~120 ℃, so that the tuning frequency of the cavity does not change with the external temperature.
The dual-section isolator and other components are used at the same time to make the isolation of each port is high and mutual interference is small.
The equipment body is made of aluminum alloy materials, with solid structure and light weight. It can be installed on a series of frames such as 19-inch standard size, which is generally beautiful and atmospheric.

Technical Specifications:

ITEM	SPECS	REMARK
Frequency range	330-470MHz
Frequency Separation	≥150 KHz
Tuning Range	5.0MHz
VSWR	Input≤1.25 Output≤1.50
Isolation ANT-TX	≥55dB
Isolation TX-TX	≥65dB
Power	50W(CW)/ port
Temperature	Normal atmospheric temperature +15℃～+35℃;Limiting temperature -10℃～+65℃
Connector	N-K，50Ω
Color	Grey

Size and insertion loss parameters:

Number of channels	Insertion Loss			Size
Number of channels	330-400MHz	400-470MHz	470-520MHz	L（mm)	W（mm)	H（mm)
2	≤3.2dB	≤3.4dB	≤3.6dB	175	330	500
3	≤3.4dB	≤3.6dB	≤3.8dB	340	330	500
4	≤3.6dB	≤3.8dB	≤4.0dB	340	330	500
6	≤4.2dB	≤4.4dB	≤4.6dB	510	330	500
8	≤4.6dB	≤4.8dB	≤5.0dB	680	330	500