RF/Microwave Power Detector Design
时间：04-04
整理：3721RD
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Hello all,
I want to design a Power Detector to compensate for any temperature changes in my Tx design; I looked at analog.com and LT as previously advised; but their Detectors (eg LTC5536) requires a reference voltage which I don't fully grasp. I can design a good regulator for the reference voltage for detector's input; but even so, it seems I would also need a seperate voltage detector for the Power detector's output.
What I want is to couple my Output signal with a 17-20db coupler(I have it already); then feed into my detector circuit; so if with temperature changes I should know to whether to increase or decrease my signal strengths depending on application. I am planning to control the signal strength with a variable attenuator with SPI. So a more basic solution then using Power Detector + Voltage Detector would be preferable for me; if it exists. My band is narrow; as its in Tx + coupler, not Rx.
This is for Tx side not Rx side; so high dynamic range is not as big of an issue as it would be on Rx.
Any advice on how to tackle this problem?
I want to design a Power Detector to compensate for any temperature changes in my Tx design; I looked at analog.com and LT as previously advised; but their Detectors (eg LTC5536) requires a reference voltage which I don't fully grasp. I can design a good regulator for the reference voltage for detector's input; but even so, it seems I would also need a seperate voltage detector for the Power detector's output.
What I want is to couple my Output signal with a 17-20db coupler(I have it already); then feed into my detector circuit; so if with temperature changes I should know to whether to increase or decrease my signal strengths depending on application. I am planning to control the signal strength with a variable attenuator with SPI. So a more basic solution then using Power Detector + Voltage Detector would be preferable for me; if it exists. My band is narrow; as its in Tx + coupler, not Rx.
This is for Tx side not Rx side; so high dynamic range is not as big of an issue as it would be on Rx.
Any advice on how to tackle this problem?
This one works with 2.7..5.25 V, no need to supply a precision regulator.
http://www.analog.com/en/products/lt...oduct-overview