Driver PA up to 1W
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Good morning to all the cables 2.4 ghz that I can use at low loss, I looked lmr600 but it seems to me a very high price and in Europe it seems to me that maybe you don't find an alternative?
Roberto
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iw5bsf look at this..may be this will fit for you as well..
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thank
iw5bsf look at this..may be this will fit for you as well..
https://www.wlan-shop24.de/Koaxial-Antennenkabel-H-155-Low-Loss-Wetterfest-Meterwa
yes interesting thanks I take note of it
Roberto
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thank
yes interesting thanks I take note of it
Roberto
iw5bsf look at this..may be this will fit for you as well..
Good morning to all the cables 2.4 ghz that I can use at low loss, I looked lmr600 but it seems to me a very high price and in Europe it seems to me that maybe you don't find an alternative?
Roberto
web site link
h-155 0,49 db/m @ 2400 MHz
rf-240 0.42 super low loss
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I use Airborne-10, it has 0,19dB/m loss on 2G4
https://messi.it/dati/immagini/AIRBORNE10-All2_EN.pdf
73
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I just got delivered today 1.5m of Ultraflex 7 from http://www.kabel-kusch.de made to order including 2x N. measured loss 0.55 dB @2405 MHz, including connectors.
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some words here on the TQP7M9103. I got my driver board today, which claimed 16dB Gain and 29dBm P1dB. From the datasheet, it was obvious that this cannot be given over the full frequency range as the Qorvo device needs a bit of matching at the input and output.
First measurements: 6dB gain and ca. 20 dBm P1dB. I suspect therefore that this could be improved with some snowflaking (Faehnchenschieben) and as this is low enough power to be safe, I'll go for it
The output inductance (L1) for the bias supply also seemed a bit large to me (too low SRF) so I exchanged it to a part with known parameters (22nH, 0603, 4.6GHz SRF) but this improved matters only little. Will try some snowflaking over the weekend.
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Rather interestingly I purchased a similar board a while back and was less lucky. It was labelled as 50Mhz - 4GHz and when I tested it at 2.4GHz I discovered that I had actually purchased an active short circuit i.e. it consumed 100mA and had no gain! The device was labelled as a Qorvo SPF5189Z but for sure was not.
I take the view with the Chinese modules that you pay your money and take a chance, thus far I have been more lucky than unlucky so with this I just smile and carry on. I will put a 'real' device in it one day
73 Clive
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Clive, this design from DB4UM needs to be pinned. high gain and decent output power, excellent.
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web site link
h-155 0,49 db/m @ 2400 MHz
rf-240 0.42 super low loss
I use Airborne-10, it has 0,19dB/m loss on 2G4
https://messi.it/dati/immagini/AIRBORNE10-All2_EN.pdf
73
thank
Roberto
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Clive, this design from DB4UM needs to be pinned. high gain and decent output power, excellent.
Achim, it's $9.70 for three if you can wait for the slow delivery. With Fedex it's about $33. For three four layer boards that's not bad. Only slight hiccup is that it will need hotair or an oven to solder which may make it difficult for some. Will leave it to you to do any pinning in the forum as I haven't a clue how to. It would be nice if it had a SAW on the front end but it does roll off.
73, Clive
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someone was having a better result with the 1 watt board:
Hi Richard,
I have removed all shunt caps and things got a wee bit better. I then added 1p at the device in and out and now have about 9 dB gain at 2.4 GHz at 400mW.
I may leave it this way for the moment but i think i will be taking a knife to the wider part of the lines on the input and output.
Geoff GI0GDP
So keep on trying!! Cor
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this AD evaluation board seems to be quite interesting:
https://www.analog.com/en/desi…b/CN0417.html#rd-overview
and also its price: 35€ (plus shipping I suppose...)
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hello everybody I tried 3.5 m of h155 cable with two bnc that I loss 0.37 @2400
I use Airborne-10, it has 0,19dB/m loss on 2G4
https://messi.it/dati/immagini/AIRBORNE10-All2_EN.pdf
73
Roberto
I just got delivered today 1.5m of Ultraflex 7 from http://www.kabel-kusch.de made to order including 2x N. measured loss 0.55 dB @2405 MHz, including connectors.
hello test 3.5 m of h155 cable with two bnc that I loss 0.37 @2400
Roberto
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0,37dB loss on 3,5m Belden H-155 @2G4??
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hello everybody I tried 3.5 m of h155 cable with two bnc that I loss 0.37 @2400
Roberto
With all due respect, I doubt this value as no datasheet of the various H155 variants suggests an attenuation of <0.1dB/m @2400 MHz. BNC is not optimal as well on 13cm, but this is another issue. My point is that the H155 cable is a 5-6mm OD cable and even a 1/2 inch cellflex coaxial cable (LCF12-50) only reaches 0.11dB/m.
That said, 1dB difference is barely noticable in daily life unless you have QRO amplifiers or cable in front of the LNA
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With all due respect, I doubt this value as no datasheet of the various H155 variants suggests an attenuation of <0.1dB/m @2400 MHz. BNC is not optimal as well on 13cm, but this is another issue. My point is that the H155 cable is a 5-6mm OD cable and even a 1/2 inch cellflex coaxial cable (LCF12-50) only reaches 0.11dB/m.
That said, 1dB difference is barely noticable in daily life unless you have QRO amplifiers or cable in front of the LNA
Thanks and a cable that I had at the station yes, I do not like the optimal bnc are definitely N the size I made with a directional coupler and an hp436a bolometer and a hp8673d signal generator these are my means of availability
thanks again for the advice
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Thanks and a cable that I had at the station yes, I do not like the optimal bnc are definitely N the size I made with a directional coupler and an hp436a bolometer and a hp8673d signal generator these are my means of availability
thanks again for the advice
for amp I am experimenting with rf126 1 watts followed by draiver vna25 with input +10 dbm I have to print the pcb