By Y.T. Lo

Quantity 1: Antenna basics and Mathematical thoughts opens with a dialogue of the basics and mathematical recommendations for any form of paintings with antennas, together with simple ideas, theorems, and formulation, and methods. DLC: Antennas (Electronics)

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**Example text**

The highest side lobe in Fig. 11 is -10 dB. It is customary to say that the side lobe level in l/J = l/Jo cut is 10 dB down from the main beam. The width of the main beam at -3 dB level is called the half-power beamwidth, and in the cut l/J = l/Jo is given by O2 - OJ in radians or in degrees. For the far field in (35) the radiation intensity in all (both) polarizations is IA(kW = IA(k, u)1 2 + IA(k, vW (45) Alternatively, we can rewrite (39) as A(k) = IA(k)IU (46) 1-21 Basics o t=. / I 7 . r--....

71-101, 1966. [1] Basics 1-51 [4] A. C. Ludwig, "The definition of cross polarization," IEEE Trans. , vol. AP-21, pp. 116-119, 1973. [5] R. J. Stegen, "The gain-beamwidth product of an antenna," IEEE Trans. , vol. AP-21, pp. 505-506, 1964. [6] C. T. Tai and C. S. Pereira, "An approximate formula for calculating the directivity of an antenna," IEEE Trans. , vol. AP-24, pp. 235-236, 1976. (7] M. Born and E. 436. [8] C. S. Lee, S. W. Lee, and S. L. Chuang, "Plot of modal field distribution in rectangular and circular waveguides," IEEE Trans.

II. Application du principe de reciprocite aux antennes et aux guides d'ondes," Revue du CETHEDEC (Paris) N° 8-4°, pp. 71-101, 1966. [1] Basics 1-51 [4] A. C. Ludwig, "The definition of cross polarization," IEEE Trans. , vol. AP-21, pp. 116-119, 1973. [5] R. J. Stegen, "The gain-beamwidth product of an antenna," IEEE Trans. , vol. AP-21, pp. 505-506, 1964. [6] C. T. Tai and C. S. Pereira, "An approximate formula for calculating the directivity of an antenna," IEEE Trans. , vol. AP-24, pp. 235-236, 1976.