> Radio Antennas>VHF-UHF>Cross & helix>430-450 MHz CROSS Antenna 1200W Polarization Switch H-V-RHCP (AA)
430-450 MHz CROSS Antenna 1200W Polarization Switch H-V-RHCP (AA) View larger
Antennas Amplifiers

AA-1744-70cmH-V-RHCP-2370

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430-450 MHz CROSS Antenna 1200W Polarization Switch H-V-RHCP (AA)

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Ultimate 70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP, achieve much better results in EME contests, DX expeditions, or LEO Satellite work with this 70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP.

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP will allow you to change the three most important polarizations with a full 1200W power. Horizontal, Vertical, and Right Hand Circular polarization. The only condition is the electrical length between two perpendicular dipoles must be 90° or 173mm on a 70cm band. That condition satisfies all our 70cm CROSS antennas.

It does not matter do you want to work LEO Satellites that you need RHCP polarization or terrestrial / EME contests where in most cases, you will need just horizontal or vertical. You will be always at your best. Maximum polarization mismatch will be 3dB or less. With the possibility to fast switch the best appropriate polarization.

Polarization switching should be done exclusively “on cold”. Without any applied power.

Use this CROSS Antenna for EME contests, DX expeditions, or LEO Satellites.

Antennas Amplifiers (AA) equipment is available in backorder only, and will be shipped within 10 to 15 days after the order.

More details

408,70 € tax excl.

Available on backorder only, within 10 to 15 days

Data sheet

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP

How does 70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP work?

Use two identical cables of any length. On one side connect to the 70cm CROSS antenna.

On the other side, connect the cable from the horizontal polarization antenna to the appropriate input on the 70cm polarization switch. The same is for the vertical polarization antenna.

The default position is horizontal polarization. It means you do not need any power supply to connect to the switch. The transceiver will be connected automatically to the horizontal polarization antenna.

The inside schematic is below:

2m and 70cm CROSS Antenna Transmit/Receive Horizontal-Vertical-RHCP Schematic

The 2-Way divider is internal. Solved with high-power Teflon coaxial cable.

Default polarization is Horizontal. You do not need to apply any voltage to the 70cm CROSS Switch.

Apply +12V to +12V pin on the 70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP

Vertical polarization is obtained with relay 3 (Rly3) on the schematic or on the device setting pin “V” to “-“.

RHCP polarization is obtained by applying a voltage to relays 1, 2, and 4 or on the device setting pin “RHCP to “-“

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz Wiring

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz Wiring

Two 70cm CROSS Antennas 430-450MHz Polarization Switch H-V-RHCP 1200W Wiring

Two 70cm CROSS Antennas 430-450MHz Polarization Switch H-V-RHCP 1200W Wiring

All is the same for the four antennas.

What do you need to switch polarizations from horizontal to vertical and RHCP?

  1. The simplest solution is to use just a 3-Way rotary switch. On one side connect to the power supply and on the other side to 70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP terminals.
  2. The same but with added LED diodes for indication of actual polarization.
  3. Electronic switching for station automation.

How to Switch Polarizations:

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz How to Switch Polarizations

Switch H-V-RHCP Measurements:

On horizontal polarization achieved minimal insertion loss of just 0.22dB with a super low SWR of just 1.004.

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz Horizontal Antenna Insertion Loss and SWR

Vertical polarization, minimal insertion loss of just 0.24dB with super low SWR of just 1.009.

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz Vertical Antenna Insertion Loss and SWR

 RHCP polarization. SWR is just 1.03

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz RHCP SWR

The phase difference between Horizontal and Vertical antenna connectors after calibrating on horizontal

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz RHCP Calibrated Phase on Horizontal Polarization Connector

Measured Phase Difference on Vertical Polarization Connector, the achieved phase difference is just 0.63°

70cm CROSS Antenna 1200W Polarization Switch H-V-RHCP 430-450MHz RHCP Measured Phase Difference on Vertical Polarization Connector

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