Antenna six to two switch by OK2ZAW

Main functions:

• Six outputs to two inputs.
• Frequency range DC-30 MHz
• Characteristic impedance 50 ohm
• High isolation between A nd B ports, better then 80dB.
• Insertion loss better then 0.05dB.
• Power rating DC to 30 MHz
  • 2 kW continue wave
  • 3,5 kW PEP (SWR < 1:1.7) (tested with OM-3500)
• High quality PCB thickness 2 mm
• Two relay version, 12 or 5 Volt
• Connectors PL-259 female with gold plated.
• Power consumption < 4W.
• Unselected antenna ports are grounded.Do you need 50 Ohm loads for Triplexer?
• Without DC power the antenna ports are grounded.Triplexer version
• Hazardous states are excluded with FIFO interlock additional board.
• Aluminium shield enclosure.
• Aluminium mounting holder with bracket.
• Size 222 x 145 x 75 mm
• Weight 2 kg

Isolation example:

• TRX A output power 1kW = 60dBm
• isolation to port B is 80dB -> 60dBm - 80dB = -20dBm
• ~ 10uW at TRX port B

Do NOT forget to:

• Your antennas isolation!
• The safe power isolation is not only about the switch isolation!
• Never switch relay during TX!

The measured values

VSWR	Isolation A-B	The worst SWR	Isolation A to B
Isolation port A to 1, B to 2	Insert loss port B to 6	Insert loss port A to 6

Download

6 to 2 Antenna switch
main version 3	pcb	sch	eagle1487
interlock (FiFo) version 3	pcb	sch	eagle986
Open-Hardware
We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Eagle CAD files. The hardware designs are released under the Creative Commons Attribution-ShareAlike 4.0 International License

Users implementation

EC2DX	EC2DX	EC2DX	EC2DX
EC2DX	EC2DX	OK1VJ	OK1VJ
OK1VJ	OK1VJ