ULTRAHIGH FREQUENCY DUPLEXING FILTER 

Posted on by yetri

It is applied in TV technique for joint operation of two transmitters with different frequencies (video and sound signal support), loaded on one general (common) antenna.

Prevents mutual influence of transmitters and their cross modulation.
The device is made as double, 3-dB stubbed bridge with two band rejection  filters.

SPECIFICATIONS

Range frequencies 470…780 MHz
Operating frequency band 10 MHz
Input  VSWR 1,3
Losses of a path:
    -sound support 1,5 dB
    — of the video-signal 0,6 dB
Power suppression of one transmitter to the input of other 30 dB
Dimensions 250x160x60 mm
Weight 1,5 kg

 

 DUPLEXER  GSM — 900 MHz

Posted on by yetri

  The 900 MHz GSM-duplexer is intended for using on antenna paths of theGSM-900 standard mobile communication system, operating on one transceiver antenna.

 Decoupling between two paths is provided by high frequency discrimination of each filters included on it.

SPECIFICATIONS

Frequency range
   -transmission (TX) 890…915MHz
   -reception (RX) 935…960MHz
Losses in band, no more than 1,5 dB
Isolation between TX and RX, not less than 70 dB
SWR, no more than <1,5
Input/output resistance 50 Ohm
Maximum input power 50W
Temperature range minus 30..+600C
Connectors SMA-F
Overall dimensions 170x83x39mm
Weight, no more than 300g

GSM BICONICAL ANTENNA

Posted on by yetri

We offer small-sized broadband antenna for mobile communication, which operates on two GSM 900/1800 standard ranges.

It is a cylinder with 50 mm diameter and 120 mm height.

It operates both in composition of repeater for mobile communication and in composition of transmitter of the base station of operator’s mobile communication.

The antenna is easily at installation and does not demand adjustment.

Type of connector is on the customer’s order.

SPECIFICATIONS

Operating frequency range 880…960 MHz 1710…1870 MHz
VSWR , no more than 1,4 1,6
Gain factor 2,4  dB 2,6  dB
Input   impedance 50 Ohm
Maximum  radiating power 20 W
Weight, no more than 100g
Polarization linear vertical
Directional pattern of antenna in horizontal  plane circular

It is possible to increase gain factor in twice at the expense of cylinder’s height increasing.

PARABOLIC-DISH ANTENNA

Posted on by yetri

We are suggesting the parabolic-dish antenna, which transforms wide directional pattern to  narrow  diagram of paraboloid.

SPECIFICATIONS

Frequency range 1,5…2,5 GHz
Bandwidth 0,05 fcenter
VSWR 1,3
Input resistance 50/75  Ohms
Gain 15 dB
Max. power 5 W
Dimensions 30x25x20 cm

QUARTER-WAVE  VHF,UHF ANTENNAS

Posted on by yetri
It is intended  for UHF and VHF transmitters.
SPECIFICATIONS
Frequency range 1,5…2,5 GHz
Bandwidth 0,05 fcenter
VSWR 1,3
Input resistance 50/75  Ohms
Gain 15 dB
Max. power 5 W
Dimensions 30x25x20 cm