Experiences with MMANA-GAL and unrealistic gain?
时间：04-08
整理：3721RD
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Hello,
I was wondering if anyone had used MMANA-GAL in designing antennas and found that gain seems to be unrealistic across many bands?
I am using MMANA-GAL more in a way to reverse engineer antennas (specifically military antennas) to use their gain patterns in simulating combat radio networks. I have tried to reverse simple monopole, quarter-wave antennas and find that I am getting gain values that are higher than I would expect. I can load the antennas and get results close to what I am expecting (sometimes), but even then most of the antennas do not seem to be loaded in real life.
A 1.2 meter monopole whip like the one below seems to get very high gains across the UHF band.
Tactical Gear Command On-Line Store: AN/PRC-148 MBITR 30 TO 88 MHz 1 METER BLADE ANTENNA
Using a 14" VHF antenna, with out putting any sort of load on it I get positive gains in the 30Mhz to 90Mhz range where I was expecting to see gains below 0, in the -30dBi range.
My question is, does MMANA-GAL automatically assume when calculating the gain that it will be tuned to that frequency? What can I do to simulate gain patterns more realistically with MMANA-GAL?
I can post images in the morning of the gain patterns that I am using as well as the mma files.
I was wondering if anyone had used MMANA-GAL in designing antennas and found that gain seems to be unrealistic across many bands?
I am using MMANA-GAL more in a way to reverse engineer antennas (specifically military antennas) to use their gain patterns in simulating combat radio networks. I have tried to reverse simple monopole, quarter-wave antennas and find that I am getting gain values that are higher than I would expect. I can load the antennas and get results close to what I am expecting (sometimes), but even then most of the antennas do not seem to be loaded in real life.
A 1.2 meter monopole whip like the one below seems to get very high gains across the UHF band.
Tactical Gear Command On-Line Store: AN/PRC-148 MBITR 30 TO 88 MHz 1 METER BLADE ANTENNA
Using a 14" VHF antenna, with out putting any sort of load on it I get positive gains in the 30Mhz to 90Mhz range where I was expecting to see gains below 0, in the -30dBi range.
My question is, does MMANA-GAL automatically assume when calculating the gain that it will be tuned to that frequency? What can I do to simulate gain patterns more realistically with MMANA-GAL?
I can post images in the morning of the gain patterns that I am using as well as the mma files.