Calculation of the effective sun-radiation horizontally surface on earth
How many percent of the sun-radiation reaches a horizontal surface at the given geographical position, because the sun is not simply
perpendicular over that and in addition be liable to the day-time- and year-time-course? The geographical position in the example
belongs to Mainflingen-Offenbach. The calculation is difficult, because of the integration over the formula below, from 0 to 365 x 24 hours.
with ls=2*pi/24*t-pi and bs=nWK*sin(2*pi/365/24*t-pi/2) the coordinates of the sun-point on earth
Also in spherical coordinates this calculation is difficult. Therefore the SIMPSON formula is recommended here. For arbitrary coordinates on the earth's surface
this iteration is suitable here.
Calculation of the effective sun-radiation vertically surface on earth
How many percent of the sun-radiation reaches a inclined surface pointing to north respectively south at the given geographical position, because the sun is not simply
perpendicular over that and in addition be liable to the day-time- and year-time-course? The geographical position in the example
belongs to Mainflingen-Offenbach. The calculation is difficult, because of the integration over the formula below, from 0 to 365 x 24 hours.
with ele, the elevation to the sun, neig, the inclination of the surface and ris, the direction to the sun and rif, the direction of the surface
This calculation is difficult. Therefore the SIMPSON formula is recommended here. For coordinates >= 39 degrees on the earth's
surface this iteration is suitable here.
Penetration of electromagnetic waves in materials - or: Handy at the ear
The result of the Maxwell-Equitations for electromagnetic waves in materials with finit electrical conductorship sais: By a frequency of
1.000 MHz and the assumption that the electrical conductorship of a skull is 0.0179 / (Ohm*cm), the penetration of the electromagnetic waves is
11.895 mm into the human body. Then the field decreases to 36.79 %. Above 1200 MHz resonance phenomena arise and this calculation is not valid.
(Calculation from K: SIMONYI, Theoretische Elektrotechnik, Technical University Budapest)
Conductivity of different human organs [here]
The result is for stretched width antennas in free space, medium or minimum 2 x λ over ground with sinusoidal current and l>>d. For the resonances frequency and wire diameter have to be specified.
Lenghts are related to free space. The resonance-calculation delivers the lenght for free space. To get the geometric lenght in medium you have to watch lenght in medium.
It is beta-software. For experts I have transfered the 2kl in the auxilliary calculation. For arguments greater than 36 the calculation of Si(x) and Ci(x) is not exact. Continuing calculations [here].
See also: Antenna Theory - Analysis and Design, BALANIS, Arizona State University, Tempe, AZ
BALANIS-impedance of antenna / dipol
antenna
integral-sine and -cosine
trend of impedance over l/λ, λ=1 m, d=1 mm, vacuum:
Calculation of the influence of ideal ground for the impedance of dipols
For horizontal and vertical dipols BALANIS calculation. The input impedances will be inserted by the programs above, You can use befor this calculation.
Also see: BALANIS, Arizona State University, Tempe, AZ
Influence of ideal ground for dipol impedance BALANIS
For the resonances frequency and wire diameter have to be specified. Lenghts are related to free space. The resonance-calculation delivers the lenght for free space. To get the geometric lenght in medium you have to watch
lenght in medium. It is beta-software. For experts I have transfered the 2kl in the auxilliary calculation. For arguments greater than 36 the calculation of Si(x) and Ci(x) is not exact.
Continuing calculations [here].
See also: Antenna Theory - Analysis and Design, BALANIS, Arizona State University, Tempe, AZ
BALANIS-impedance of antenna / vertical
antenna
integral-sine and -cosine
trend of impedance over l/λ, λ=1 m, d=1 mm, vacuum:
For transforming up L is connected to the source and C parallel to load. For transforming down C is parallel to source and L is connected to load. More information [here]
There are different solutions for calculating a PI-filter. Here one with 2 Boucherot-circuits. First we transformate to a low help resistance, then we transformate to the destination resistance.
By changing the help resistance it is possible to adjust Ca, Cb or L. Maybe the automatic search works for a chosen Ca, Cb or L. First calculate the Pi-filter manually, then choose a value
close to the value shown. Automatic search is a beta program version. More information [here]
There are different solutions for calculating a PI-filter. Here the mathematically exact solution with the Q factor. Try a start value for Q between 5...20. Automatic search for Ca, Cb and L is a beta program version.
More information [here]
effective sun-radiation horizontally surface
