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Circular Polarised FM Antenna (Square Cycloid)


Circular Polarised FM Antenna (Square Cycloid)

Simple and Compact Design

Despite it's square shape, don't be fooled, this antenna gives true circular polarization exactly the same as a circular shaped antenna would do.

The antenna is a simple, compact design made of lightweight aluminium welded together, not bolted, this means better reliability with aging and no possibility of things getting loose in the wind. It's perfect for countries where the regulator demands circular polarisation in the permit or licence.

Ideal for low-power broadcast stations up to 800W for the N type versions and up to 3.2kW for the 7-16 DIN versions.

There are three versions of this antenna, the 2 way, 4 way and 8 way with gains of 3.6dBi, 6.6dBi and 9.6dBi as shown in the specification table below.

Technical Specification

2 Way4 Way8 way
Gain (V+H) dBi3.6dBi6.6dBi9.6dBi
Gain (V+H) dBd1.4dBd4.4dBd7.4dBd
Bandwidth
(SWR 1.5)
+/- 2.8 MHz+/- 2.8 MHz+/- 2.8 MHz
Impedance50 ohm50 ohm50 ohm
SWR at
Tuned Frequency
<1.2<1.2<1.2
Max. Power
N Connector
800W800W800W
Max. Power
7-16 Connector
1.6kW3.2kW3.2kW
ConstructionAluminium, Stainless Steel and Teflon
Weight5.6Kg11Kg22Kg

Click here for User Manual

The radiation plots and picture shown in this page are for the 2 way / stacked version. The 4 and 8 way / stacked versions are the same but with total gains of 6.6 dBi and 9.6 dBi

The price panel below shows the N connector versions which are all rated at 800W. Power levels up to 3.2kW are available using the 7-16 DIN connectors, please contact us for the price of these.


Inc. Delivery to UNITED STATES

Circular Antenna Cycloid 800W N-Type Aluminium (tma-wb)
US$ 293.15

CIRCULAR POLARISATION 2 STACKED ANTENNA - N Type +2.6dBi (2tma-uk)
US$ 576.81

CIRCULAR POLARIZATION 4 STACKED ANTENNA N Type 5.2dBi (4tma-uk)
US$ 1245

CIRCULAR POLARIZATION 8 STACKED ANTENNA N Type 9.6dBi 800W Max. (8tma-uk)
US$ 2421

CIRCULAR POLARIZATION 8 STACKED ANTENNA 3-1/8 CON. 9.6dBi 15kW Max. (8tma-uk15kw)
US$ 4727

Aareff Mixed Circular Antenna Cycloid Photograph 2TMA-UK

3D COMBINED TOTAL PATTERN

This is the combined horizontal and vertical polarization pattern of the 2 way / stacked version. Note that the 'End Fire', this is the lobe shooting out of the top straight up vertically is -19dB relative to the maximum gain. Ofcom, the regulator in the UK requires this to be -14dB or better, so this antenna system is perfect for legal and compliant broadcasting.


Aareff Mixed Circular Antenna Cycloid 3D Combined And Total Radiation Pattern 2TMA-UK

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ASSEMBLING THE CYCLOIDS

Whether it's the two way, four way or eight way antenna system, each Cycloid Dipole is easy to assemble.

As you can see in the picture below, each Cycloid Dipole is delivered in three pieces, the main body and the two vertical radiators.

Assembly is a breeze. 1. Simply attach and screw tight the vertical radiators to the main body and then 2. Swing the Gamma Match across and screw it to the feed point.

The antenna is now ready for mounting to the tower, pole or mast and connecting to the coaxial splitter cable supplied.

You can find the full installation instructions here

Aareff Mixed Circular Antenna Cycloid Layout 2TMA-UK

FRONT AND BACK VIEW

Aareff Mixed Circular Antenna Cycloid Assembled 2TMA-UK Aareff Mixed Circular Antenna Cycloid Rear View 2TMA-UK

ALUMINIUM WELDED

Aareff Mixed Circular Antenna Cycloid Welded Inner Corner 2TMA-UK Aareff Mixed Circular Antenna Cycloid Welded Outer Corner 2TMA-UK

ANTENNA GEOMETRY

Aareff Mixed Circular Antenna Cycloid Geometry 2TMA-UK

H PLANE VERT. AND HOR.

Aareff Mixed Circular Antenna Cycloid H Plane 2TMA-UK

H PLANE COMBINED TOTAL

Aareff Mixed Circular Antenna H Plane Total 2TMA-UK

E PLANE VERT. AND HOR.

Aareff Mixed Circular Antenna Cycloid E Plane 2TMA-UK

E PLANE TOTAL

Aareff Mixed Circular Antenna Cycloid E Plane Total 2TMA-UK





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