Download e-book for kindle: Advances in Satellite Communications by M. Karimi, Y. Labrador

By M. Karimi, Y. Labrador

ISBN-10: 9533075627

ISBN-13: 9789533075624

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Extra resources for Advances in Satellite Communications

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Decrease in the spatial coherence of transmitted waves due to a wave front distortion. modulus of the complex degree of coherence (DOC) and the BER derived from the average received power. Sec. 3 shows the results of analysis of the effect of atmospheric turbulence on satellite communications in Ka-band at low elevation angles. We analyze the DOC and the BER derived from the average received power for the uplink and the downlink, respectively. Furthermore, we analyze the effect of atmospheric turbulence on the BER when we make an aperture radius of the ground station’s antenna large in order to increase the antenna gain and improve BER performance.

This antenna generates circularly polarized scanning radiation pattern from backfire to normal. 5 GHz (Nakano et. al, 1991). Fig. 13 illustrates typical radiation patterns, the backfire conical and normal radiation pattern reaching the antenna gain of 10 dB, Fig. 13 a) and b), respectively. 19 Helical Antennas in Satellite Radio Channel a) b) Fig. 11. a) Standard, conical and tapered BHAs, and b) their radiation patterns. 76 87 Table 1. Simulation results of radiation characteristics of standard, conical and tapered BHA.

No. 9, (September 1986), pp. , Yamauchi, J. & Mimaki, H. (1988). Backfire radiation of a monofilar helix with a small ground plane, IEEE Transactions on Antennas and Propagation, Vol. 36, No. ), pp. , Mimaki, H. & Yamauchi, J. ). Extremely lowprofile helix radiating a circularly polarized wave, IEEE Transactions on Antennas and Propagation, Vol. 39, No. 6, (June 1991), pp. , Mimaki, H. & Yamauchi, J. (1991). Loaded bifilar helical antenna with small radius and large pitch angle, Electronic Letters, Vol.

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Advances in Satellite Communications by M. Karimi, Y. Labrador


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