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I am designing a active antenna (100KHz). Can I use AD 797 (ultra LNA) as the amp instead of JFET. the input output impedance of this opamp are similar to that of JFET (high input imp and low output imp). I have not seen any design implementing opamp in active antenna and was curious if there...

Hi I have got few papers which do not exactly explain the theory but gives an equation for calculating the secondary correction factor " Loran is retarded when travelling over sea water as opposed to through the atmosphere. When transmitted, part of the electromagentic wave is in air and some...

Hi Is the propagation of a signal on a sea water path faster than that on a all ground path. I know that conductivity causes this but what is the equation or theory that explains this effect on speed. All literature I have got explains propagation INSIDE the medium (in water, in air). My...

what is a magnetic crossed-loop antenna and how does it work.

Hi I am trying to receive Loran (100 KHz) signal using H field and E field antenna. The E field antenna has o/p impedance 50 ohms and a gain of 20 dB. I pass this signal through a LNA (30 dB gain) and then BPF and I get a very clean loran signal. The H field antenna has o/p impedance 50 ohms...

Hi I am trying to receive Loran (100 KHz) signal using H field and E field antenna. The E field antenna has o/p impedance 50 ohms and a gain of 20 dB. I pass this signal through a LNA (30 dB gain) and then BPF and I get a very clean loran signal. The H field antenna has o/p impedance 50 ohms...