I am looking for a power detector that could detect 5-10ns pulses of RF energy (400MHz-1.5GHz range).

I am looking for a power detector that could detect 5-10ns pulses of RF energy (400MHz-1.5GHz range). Would a Schottky diode be the best option, based on your presentation? However, I do need it to be able to detect -50dBm

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  • On behalf of Michiel Kouwenhoven:

    This is a challenging problem. In general there are two options:

    1) Use a Schottky detector preceded by an LNA; the LNA needs to have 25-30dB of gain and sufficiently fast response
    to gain up the Schottky detector input signal to -25dBm or above.  The Schottky devices that ADI offers provide around 10ns rise/fall time (ADL6010, LTC5564). Both do not entirely reach down to 400MHz, though. later this year we will release the ADL6012
    (see analog.com) that does have around 2ns rise/fall time but needs a -10dBm input signal, i.e. more LNA gain at the input.

    2) LOG detector like AD8317, which has rise/fall times of 10/6ns. Propagation delay, though is probably in the 100ns range. It can detect down to -50dBm (or lower).

    3) An SDLVA: HMC613 has 4ns rise/18ns fall time and is able to detect close to -50dBm.  HMC1013 has better sensitivity, but is spec’ed
    down to 500MHz, not 400MHz. It might still be useful. Both of these are suitable for high-value, high-performance solutions, and
    not very suited for low-cost applications.

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  • On behalf of Michiel Kouwenhoven:

    This is a challenging problem. In general there are two options:

    1) Use a Schottky detector preceded by an LNA; the LNA needs to have 25-30dB of gain and sufficiently fast response
    to gain up the Schottky detector input signal to -25dBm or above.  The Schottky devices that ADI offers provide around 10ns rise/fall time (ADL6010, LTC5564). Both do not entirely reach down to 400MHz, though. later this year we will release the ADL6012
    (see analog.com) that does have around 2ns rise/fall time but needs a -10dBm input signal, i.e. more LNA gain at the input.

    2) LOG detector like AD8317, which has rise/fall times of 10/6ns. Propagation delay, though is probably in the 100ns range. It can detect down to -50dBm (or lower).

    3) An SDLVA: HMC613 has 4ns rise/18ns fall time and is able to detect close to -50dBm.  HMC1013 has better sensitivity, but is spec’ed
    down to 500MHz, not 400MHz. It might still be useful. Both of these are suitable for high-value, high-performance solutions, and
    not very suited for low-cost applications.

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