Calculation ruler for quickly calculating free space attenuation of electromagnetic waves
A free-space, fast-calculating technology, applied in hand-operated computing devices, calculations, analog computers, etc., can solve the problem of inability to quickly calculate the attenuation value of electromagnetic waves, and achieve significant military benefits, save calculation time, and calculate and read quickly. Effect
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Embodiment 1
[0043] Such as figure 1 As shown, a slide rule for quickly calculating the free space attenuation of electromagnetic waves includes a base 1, a distance scale fixed on the base 1, a transparent reading plate 3 fixed on the distance scale, and a movable setting The frequency scale 4 and the attenuation value scale 5 on the base 1 , the frequency scale 4 and the attenuation value scale 5 slide in linkage, and the transparent reading plate 3 is provided with a frequency pointer 6 .
[0044] Specifically, the distance scale includes a first scale 21 and a second scale 22 arranged in parallel on the base 1, and the attenuation value scale 5 is located between the first scale 21 and the Between the second scales 22, the frequency scale 4 is located on one side of the first scale 21, and the frequency scale 4 is connected to the attenuation value scale 5 through a connecting rod. There is a gap between the bottom of the scale 21 and the base, and the connecting rod traverses through...
Embodiment 2
[0046] Such as Figure 2-7 As shown, the slide rule for quickly calculating the free space attenuation of electromagnetic waves in the embodiment of the present invention is different from the first embodiment in that: the scale display range of the first scale is 10-2000m, and the first scale The reference length of the ruler is 5cm with the length of 10-100m, and the formula for determining the scale of the first scale is:
[0047]
[0048] Where: S 1 In order to display the distance, the unit is m;
[0049] d 1 It is the real distance between the scale corresponding to a certain distance value S and the "0 point" on the scale, and the unit is cm.
[0050] The scale display range of the second scale is 1~200km, the reference length of the second scale is 5cm with the length of 1~10km, and the scale determination formula of the second scale is:
[0051]
[0052] Where: S 2 To display the distance, the unit is km;
[0053] d 2 It is the real distance between the s...
Embodiment 3
[0094] Such as Figure 8 As shown, a slide rule for quickly calculating the free space attenuation of electromagnetic waves includes a base 1, a distance scale fixed on the base 1, a transparent reading plate 3 fixed on the distance scale, and a movable setting The frequency scale 4 and the attenuation value scale 5 on the base 1 , the frequency scale 4 and the attenuation value scale 5 slide in linkage, and the transparent reading plate 3 is provided with a frequency pointer 6 .
[0095] Specifically, the distance scale includes a first scale 21 and a second scale 22 arranged in parallel on the base 1, and the attenuation value scale 5 is located between the first scale 21 and the Between the second scales 22, the frequency scale 4 is located on one side of the first scale 21, and the frequency scale 4 is connected to the attenuation value scale 5 through a connecting rod. There is a gap between the bottom of the scale 21 and the base, and the connecting rod traverses throug...
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