Collinear Base Station Antennas, 27 MHz to 960 MHz

A collinear antenna offers an omnidirectional radiation pattern

The ZCG Scalar range of collinear base station antennas includes models for 27 MHz marine CB radio, 27 MHz land CB radio, VHF frequencies 70 to 174 MHz and also the UHF band 300 to 960 MHz.

Specify your transmit and receive frequencies within the bandwidth limitation indicated and your collinear antenna will be manufactured and tuned accordingly to better than 1.5:1 VSWR.

A collinear antenna offers these features :

An omnidirectional 360° radiation pattern,
Good gain,
Low wind loading,
Occupies minimal tower space, and
Easy mounting with 2 parallel mast clamps.

The height of these collinear antennas varies according to frequency and gain :

The higher the centre frequency, the shorter the antenna.
The higher the gain, the taller the antenna with a more narrow E-Plane beamwidth.

Mast mounting clamps, coaxial feeder cable, connectors and other accessories are all available separately to complete the antenna installation.

NOTE : FM Radio Broadcasters should use the G12HP collinear broadcast antenna specifically designed for the purpose and optimised for better than -20 dB return loss.

27 MHz Marine CB Radio Collinear Antenna

Model HM2800 : Built to full commercial specifications, the HM2800 “Coastguard” 27 MHz marine base station antenna will survive long term in the most severe weather conditions and hostile environments.

Standing 6.2 metres tall and factory tuned for the frequency range 27.680 to 27.980 MHz, the brass and cable internals are fully sealed inside a strong white fibreglass radome and stainless steel mount tube.

The 1 metre cable tail is terminated with an N-Female connector rated for up to 50 watts input power.

2 x UAM180L heavy duty galvanised steel parallel clamps are recommended for mounting.

27.065 MHz Land CB Radio Collinear Antenna

Model ZM108A-CB : This ground independent collinear base station antenna is factory tuned for 27.065 MHz land CB radio communications. The antenna can be mounted parallel to a mast or side mounted to any flat vertical surface, such as the outside wall of a building.

The white fibreglass radome and stainless steel mount tube stands 2.8 metres tall. The internal radiator is copper and the end fed half wave design produces excellent performance. An N-Female connector is located at the base of the stainless steel mount tube. The maximum input power rating is 25 watts. All components used are of the highest quality to ensure long term reliable service in harsh Australian weather conditions.

For mounting to a round mast betwwen 20 mm and 50 mm in diameter, 2 x EB1SS stainless steel parallel clamps are recommended. To mount the ZM108A-CB antenna to the side of a flat vertical structure such as the outside wall or facia board of a building, use 2 x NSM-B20M nylon side mounts.

40.6 MHz Collinear Antenna

Model ZM40 : Factory tuned for 40.6 MHz, the ZM40 collinear antenna offers an economical and light weight solution for omnidirectional transmit and receive. This end fed half wave base station antenna consists of a 5 piece anodised aluminium telescopic tube which stands 3.85 metres tall when fully assembled. An N-Female connector rated for up to 50 watts input power is located at the base of the mount tube. 2 x EB1SS clamps are recommended for mounting.

VHF Low Band 70 to 140 MHz Collinear Antennas

These VHF omnidirectional collinear base station antennas are suitable for two-way radio and other systems operating within the 70 to 140 MHz frequency range. Built to full commercial standard, the radiating elements are enclosed within a robust fibreglass radome providing full protection against the elements and minimal wind loading. An N-Female connector rated for up to 250 watts power is located at the base of the aluminium mount tube. Clients requiring a power rating higher than 250 Watts should contact ZCG Scalar for advice.

Model	Service	Frequency Range	Maximum Bandwidth	Gain	Max Power	Mount Tube, Connector	Max Height	Clamps
G11	Commercial	70-85 MHz	Any 3%	3 dBd	250 W	Aluminium, N-Female	5.6 metres	2 x UAM180L
G12	Commercial	85-140 MHz	Any 5%	3 dBd	250 W	Aluminium, N-Female	4.8 metres	2 x UAM180L

VHF High Band 148 to 174 MHz Collinear Antennas

These VHF high band omnidirectional collinear base station antennas are designed for commercial, paging, trunking and general communication systems operating within the 148 to 174 MHz frequency range. The radiating elements are enclosed within a robust fibreglass radome providing full protection against the elements. Mount tubes are aluminium with an N-Female connector located at the base.

Model	Service	Frequency Range	Maximum Bandwidth	Gain	Max Power	Mount Tube, Connector	Max Height	Clamps
G21	Light	148-174 MHz	Any 1%	3 dBd	250 W	Aluminium, N-Female	3.5 metres	2 x EB1SS
G22	Commercial	148-174 MHz	Any 3%	6 dBd	250 W	Aluminium, N-Female	5.6 metres	2 x UAM180L
G23	Commercial	148-174 MHz	Any 4%	3 dBd	250 W	Aluminium, N-Female	3.5 metres	2 x UAM180L
G25	Commercial	148-174 MHz	Any 3%	4.5 dBd	250 W	Aluminium, N-Female	4.5 metres	2 x UAM180L

UHF 300 to 400 MHz Collinear Antenna

The G35 omnidirectional collinear base station antenna is designed for commercial, paging, trunking, data and general communication systems operating within the UHF frequency range 300 to 400 MHz.

Offering a 5% bandwidth and 6 dBd gain, this collinear is built to full commercial standards. The radiating elements are enclosed within a robust tapered fibreglass radome ensuring reliable performance and a long service life in the harshest of weather conditions. Wind loading is minimal.

Specify your transit and receive frequencies within the 5% bandwidth limitation when ordering and your collinear antenna will be manufactured and tuned accordingly at better than 1.5:1 VSWR.

An N-Female connector rated for up to 250 watts power is located at the base of the aluminium mount tube. Clients who require a higher power rating should contact ZCG Scalar for advice.

Model	Service	Frequency Range	Maximum Bandwidth	Gain	Max Power	Mount Tube, Connector	Max Height	Clamps
G35	Commercial	300-400 MHz	Any 5%	6 dBd	250 W	Aluminium, N-Female	2.9 metres	2 x UAM180L

UHF 380 to 520 MHz Collinear Antennas

This range of omnidirectional collinear base station antennas are designed for use within the UHF frequency range 380 to 520 MHz. They feature high quality fibreglass radomes with internal construction to full commercial standard ensuring reliable long term service.

The G49R model is a more robust and rugged design purpose built to survive the most extreme conditions. Alpine regions where storms, high winds, snow and ice are prevalent are typical locations where this ruggedised model is recommended.

Model	Service	Frequency Range	Maximum Bandwidth	Gain	Max Power	Mount Tube, Connector	Max Height	Clamps
G45	Commercial	380-520 MHz	Any 4%	3 dBd	250 W	Aluminium, N-Female	2.5 metres	2 x EB1SS
G46	Commercial	380-520 MHz	Any 1.5%	6 dBd	250 W	Stainless Steel, N-Female	3.0 metres	2 x EB1SS
G49	Commercial	380-520 MHz	Any 1.5%	9 dBd	250 W	Stainless Steel, N-Female	3.5 metres	2 x EB1SS
G49R	Extreme Rugged	380-520 MHz	Any 1.5%	9 dBd	250 W	Alumium, N-Female	4.0 metres	2 x UAM180L

UHF 520 to 960 MHz Collinear Antennas

These high gain UHF omnidirectional collinear base station antennas are suitable for two-way radio systems operating within the 520 to 960 MHz frequency range. Built to full commercial standard, the radiating elements are enclosed within a robust fibreglass radome providing full protection against harsh weather conditions and a long service life. Wind loading is minimal.

Model	Service	Frequency Range	Maximum Bandwidth	Gain	Max Power	Mount Tube, Connector	Max Height	Clamps
G56	Commercial	520-960 MHz	Any 1.5%	6 dBd	250 W	Stainless Steel, N-Female	3 metres	2 x EB1SS
G59	Commercial	520-960 MHz	Any 1.5%	9 dBd	250 W	Stainless Steel, N-Female	4 metres	2 x EB1SS