ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: DIY IEM Antenna combiner  (Read 3050 times)

Doug Boyd

  • Newbie
  • *
  • Offline Offline
  • Posts: 18
DIY IEM Antenna combiner
« on: July 07, 2016, 07:36:44 pm »

I've used splitter/combiner units from Mini-Circuits in active & passive antenna distribution systems for wireless microphones, but would there be any issue using a 4 way power splitter/combiner such as the ZN4PD1-50 to combine 4 IEM antenna?

The 4 way splitter is 50ohm and gives > 20dB isolation between inputs.  Insertion loss appears to be just over 6dB but if used with an LDPA antenna making up that, would the combining to a single antenna be of benefit?

Doug Boyd
Stageworks Audio
Auckland, NZ

https://www.minicircuits.com/pdfs/ZN4PD1-50+.pdf

Logged

Jason Glass

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 829
    • CleanWirelessAudio.com
Re: DIY IEM Antenna combiner
« Reply #1 on: July 07, 2016, 08:55:27 pm »

It's isolation is a bit low @ 23dB for high power systems, but you might get away with it at low power (=<50mW). It would be best to test it and measure the IMD products with a spectrum analyzer before attempting to use the setup in a critical application.

Sent from my mobile phone. Please excuse the inevitable spelling and grammatical errors.

Henry Cohen

  • Moderator
  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1049
  • Westchester Co., NY, USA
Re: DIY IEM Antenna combiner
« Reply #2 on: July 08, 2016, 10:11:30 am »

I've used splitter/combiner units from Mini-Circuits in active & passive antenna distribution systems for wireless microphones, but would there be any issue using a 4 way power splitter/combiner such as the ZN4PD1-50 to combine 4 IEM antenna?

The 4 way splitter is 50ohm and gives > 20dB isolation between inputs.  Insertion loss appears to be just over 6dB but if used with an LDPA antenna making up that, would the combining to a single antenna be of benefit?https://www.minicircuits.com/pdfs/ZN4PD1-50+.pdf

This model has better specs, both in terms of power handling as a combiner and isolation. That said, an isolator on each each IEM output is strongly recommended.
Logged
Henry Cohen

CP Communications    www.cpcomms.com
Radio Active Designs   www.radioactiverf.com

ProSoundWeb Community

Re: DIY IEM Antenna combiner
« Reply #2 on: July 08, 2016, 10:11:30 am »


Pages: [1]   Go Up
 



Page created in 0.03 seconds with 23 queries.