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Hey, guys. I have problems in using a 35GHz power amplifier---Triquent 4522. Its biasing are right, the max output power is 20dBm , but the gain is negtive.
Have you ever encountered this kind of weird measured results??
Thanks. Any advice will be appreciated.
Re: How to improve the performance of a power amplifier-TGA2
Thanks for opinion. Yes, the specs in datasheet is tested on wafer and the probe, and i test it using bondwires and the RF connectors, but i don't think the bondwires would cause so much loss since it's less than 8mil. The operating...
Hei, guys. I recently has tested the triquint PA MMIC-TGA2508 integrated with Roger5800 , and can't get the output power at the recomanded bias condition Vd=7V, Vg=-0.36V. Actually, all the performance is worse than the spec. in the datasheet. The P1dB output power i get is 23dBm with a gain...
I've checked all the websites, Token has some material that meets my need. Thanks!
Added after 8 minutes:
I've looked it up, it seems to be a compancy relating LTCC or laminating, but not dielectric resonator. Thank you all the same.
Hi guys,
I need to design a dielectric resonator filter at 12GHz. And I want to use high Q
materials. Do you know any companies that manufacture dielectric materials.
Thanks in advance. Any help will be apprieciated.
Jane
Added after 2 hours 12 minutes:
Does anyone know? ^_^
Hi,
I've just started to do research on mode matching method. I need use it to solve step discontinuities of waveguide. But I've nerve used matlab.
Can anybody give me some matlab script using for mode matching to solve these kind of problem or recommend some matlab books, articles?
Thank...
Thank you so much, RF-OM, for all your suggestions and filter model.
I'll first use absorber material to see if the resonance frequency shift or remove. If it doesn't work, I will modify the size of the box, use 40GHz SMA connectors and try again.
After doing these changes, I'll update how...
Thank you for your advice, especially RF-OM and Mazz.
For some reason, I have to use the multilayer ground. So the vias are unavoidable.
Added after 11 minutes:
I didn't solder the connectors ground to the filter. I have uses epoxy to connect the pin of the SMA connectors with the...
The stopband of this LPF is designed to be below 40dB from13-16GHz. The following graph is my simulated results(dot lines) vs. the measured results(solid lines). In the simulated results(mark3), the resonance frequecy is about 18Ghz, which is the resonance frequecy of the Aluminum box.
Now, I...
Thank you, RF-OM.
Here is the filter model in HFSS. It's a microstripline LPF using LTCC substrate.
And vias are to connect the intermedia ground plane and bottoom ground plane.
The filter is housed in an Aluminum box using conductive epoxy.
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