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MuCiT
Joined: 19 Sep 2002
Posts: 28
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 14 Aug 2009 15:47 directional coupler |
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Hi,
I have a 30 dBm power amplifier. If I use 20 dB directional coupler with the power amplifier, how much power does coupled port give?
Regards.
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vfone
Joined: 10 Oct 2001
Posts: 2327
Helped: 326
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14 Aug 2009 17:15 coupler |
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| +10dBm
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MuCiT
Joined: 19 Sep 2002
Posts: 28
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19 Aug 2009 17:35 directional coupler |
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| Thanks for your attention. I have to use a +30 dBm transmitter and a receiver with single antenna but there is too much loss if I use the coupler. If the output power is +50dBm, coupled port power is +30 dBm but it is not useful because +50 dBm is too much power. Are there any solitions?
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vfone
Joined: 10 Oct 2001
Posts: 2327
Helped: 326
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19 Aug 2009 22:13 Re: About Directional Coupler |
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| Yes. Place a 30dB attenuator after the coupler. 30dB plus coupling attenuation (20dB) would be enough for most of the analyzers.
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