How to compute the location of the antenna when I rotate it?

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SUMMARY

The discussion focuses on computing the location of an antenna while it is being rotated, utilizing the complex exponential form of wave equations. The equation U(r,t) = U0 * exp(j*(k.r - w*t) is referenced, where U0 represents the amplitude and phase of the wave. The participants express confusion regarding how to derive amplitude and phase values based on the complex coordinates x and y, which are not defined. The conversation suggests a potential connection to previous discussions on multipath detection.

PREREQUISITES
  • Understanding of complex wave equations, specifically U(r,t) = U0 * exp(j*(k.r - w*t))
  • Familiarity with amplitude and phase in wave mechanics
  • Knowledge of complex numbers and their representation in coordinate systems
  • Basic principles of antenna theory and signal propagation
NEXT STEPS
  • Research how to derive amplitude and phase from complex coordinates in wave equations
  • Study the impact of antenna rotation on signal propagation and detection
  • Explore multipath effects in wireless communication and their relevance to antenna positioning
  • Learn about tools for simulating antenna behavior in varying conditions
USEFUL FOR

Engineers, physicists, and researchers involved in antenna design, signal processing, and wireless communication systems will benefit from this discussion.

Nate Duong
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Hi group,

I have a question regarding to detect the location of the antenna.
I read this link: https://en.wikipedia.org/wiki/Plane_wave
In the "Complex exponential form" part, the equation:
U(r,t) = U0 * exp(j*(k.r - w*t) as the function of location and time
U0 = A0 * exp(j*phi) : A0 and phi are amplitude and phase respectively.
From U0, I can write down a complex number x and y (still in time domain)
x and y should be vector on the complex coordinate.

Now, I need to define value of amplitude and phase base on value of x and y. But I do not know x and y.
When I rotate the antenna, can I define the position, amplitude and phase?

I hope anyone can give me suggestions.

Thank you.
 
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I do not understand the question, what you are trying to do, the relevance of the equations or the equipment you are using.
 
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Most likely this can only be answered by an "old timer". I am making measurements on an uA709 op amp (metal can). I would like to calculate the frequency rolloff curves (I can measure them). I assume the compensation is via the miller effect. To do the calculations I would need to know the gain of the transistors and the effective resistance seen at the compensation terminals, not including the values I put there. Anyone know those values?

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