May be some more accurate alternative to AD8302 could do that. AD8302
could measure Gain/Loss and Phase up to 2.7 GHz. I using one in my
project and its doing its job right (I think).
On 2016-07-28 19:12, Jerome Blaha wrote:
Hi Guys,
This is a little outside of time-nuts scope, but not by much. I'm
interested in finding the time between two rising edges above a set
threshold with preferably nS or high ps timing accuracy. Can this be
simply done with a few programmed Microchip PICs or with a good short
term OCXO clock? The issue I see is that a 10Mhz timing reference
with 1 cycle difference in time yields 100ns resolution, which is far
too large, so maybe a PIC can solve this.
This weekend project would be a multi-element antenna array, each with
a super-fast response log peak power detector fed into several PICs
for time of arrival. Whenever a nearby high energy RF pulse is
detected, the time of arrival between two antenna elements and hence
the direction toward the TX could be roughly computed. Some typical
log peak detectors have an 8ns input pulse response time, so I'm
hoping that rise times are similar between multiple detectors,
negating the delayed response.
There are time of arrival/AoA systems out there with synthetic
doppler, phased arrays, correlative interferometers, and phase
comparators, but it would be interesting to accomplish super wideband
AoA timing on two rising pulses with relatively cheap parts.
Thanks,
-Jerome
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--
WBW,
V.P.
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