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Horwin DF-V/U-x-5 series is a “Band pass/reject” type duplex filters based on quarter wave 5 inches width square cavities. Duplexer allows simultaneous operation of transmitter and receiver into a single antenna. Using large 5“ cavities means very high Q, resulting in very close frequency spacing and low insertion losses. Cavities are aluminium made with 5 mm thick top plate welded to the cavity body. Inner conductor and coupling loops are silver plated cooper made. Central tuning road is invar made. All this provides excellent frequency stability in temperature range from – 30 to + 60°C. Each filter is individually made and tuned, so receive and transmit frequencies should be specified when ordering.

Horwin CB8-V/Ux-x series is low insertion loss combiners with ferrite isolators used for combining several transmitters into one antenna with up to 125 kHz (VHF) and 200 kHz (UHF) frequency spacing. Combiners are configured in sets of 2, 3 or 4 channels. There are two model versions – single or dual ferrite isolators depending on the required Tx–Tx isolation. Nominal impedance is 50 Ohms with typical input SWR <1.5. Mounting option is specified by customer (e.g. “free standing”, vertically or horizontally into EIA 19” etc). N-type “female” connectors are used for input/output connections. Combiners are tuned at customer specified frequencies, so transmit frequencies should be specified when ordering.

(16=160 MHz, 3-5 elements) Inexpensive lightweight 3 or 5 elements directional antenna with “straight” driven element and “gamma matching” designed for various point to point as well as point/multipoint applications, such as rural telecommunications, repeater operations, telemetry SCADA links, etc. Antenna is made of AD31 (T6063) galvanized aluminium. Feed line connector is UHF female panel mount type mounted on driven element. Antenna is tuned to central frequency of customer specified range (< 8 MHz) or specified frequency.

5, 9 or 12 elements wide bandwidth light weight directional antenna with folded dipole as driven element designed for various point to point as well as point / multipoint application. Folded driven element incorporates “balun” matching circuit optimized for wide bandwidth and accurate matching. All components of antenna are DCgrounded for better lighting and antistatic protection.

Dipole antenna band (16 = 160 MHz) Frequency range, MHz 136 – 176 Bandwidth @ SWR < 1,5, MHz 40 Elements 1 – 4 Gain, dBd (1/4 λ dipole to mast spacing) 0, 3, 6 Gain, dBd (3/8 λ dipole to mast spacing) 3; 5,6; 9 Power rating, W 200 Overall dimensions, mm 3/8λ spacing H900/2200/4800 D 1100/1100/1100

UHF dipole antennas (45=450MHz 1-8 elements) for extensive range of applications – trunking radio systems, military communications, dispatch base stations, amateur radio repeaters, etc.