6.48. Design a three-element, −40 dB side lobe level Dolph-Tschebyscheff array of isotropic elements placed symmetrically...
6.48. Design a three-element, −40 dB side lobe level Dolph-Tschebyscheff array of isotropic elements placed symmetrically along the z-axis. Find the
(a) amplitude excitation coefficients
(b) array factor
(c) angles where the nulls occur for d =3λ/4(0◦ ≤θ ≤180◦)
(d) directivity for d =3λ/4
(e) half-power beamwidth for d =3λ/4
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6.48. Design a three-element, −40 dB side lobe level
Dolph-Tschebyscheff array of isotropic elements placed
symmetrically...
It is desired to design a broadside uniform linear array with the elements placed along the...
It is desired to design a broadside uniform linear array with the elements placed along the x-axis. The design requires a total length (edge-to-edge) of the array is 42 and the spacing between the elements must be A/2. Determine the: (a) Number of elements of the array (b) Half-power beamwidth (in degrees) for the uniform broadside array. (c) Maximum directivity (dimensionless and in dB) for the uniform broadside array. (d) Side lobe level (in dB) of the uniform broadside array....
69 A uniform array of 3 elements is designed so that its maximum is directed toward broadside. Th...
solve part e please
69 A uniform array of 3 elements is designed so that its maximum is directed toward broadside. The spacing between the elements is /2. For the array factor of the antenna, determine (a) all the angles (in degrees) where the nulls will occur. (b) all the angles (in degrees) where all the maxima will occur. (c) the half-power beamwidth (in degrees) (d) directivity (dimensionless and in dB) (e) the relative value (in dB) of the magnitude...
Design a 19-element uniform linear scanning array with a spacing of A/4 between the ele- ments....
Design a 19-element uniform linear scanning array with a spacing of A/4 between the ele- ments. (a) What is the progressive phase excitation between the elements so that the maximum of the array factor is 30° from the line where the elements are placed? (b) What is the half-power beamwidth (in degrees) of the array factor of part a? (c) What is the value (in dB) of the maximum of the first minor lobe? Verify using the computer program Arrays...
Question 11 Not yet answered Marked out of 1.00 p Flag question Two isotropic sources, both...
Question 11 Not yet answered Marked out of 1.00 p Flag question Two isotropic sources, both fed with the same amplitude and a 0 degrees phase difference, what is the minimum spacing between the elements required in order to form at least one null in the array factor: Select one: a. ob.312 O C.NA d. N2 Next page on Question 8 Not yet answered Marked out of 1. 00 p Flag question Three 5-element arrays of isotropic sources and uniform...
8.2-4 Usually, the interelement spacing of an array is about one-half wavelength. Spacings much greater than this produce major lobes in undesired directions. To illustrate this point, use the techni...
8.2-4 Usually, the interelement spacing of an array is about one-half wavelength. Spacings much greater than this produce major lobes in undesired directions. To illustrate this point, use the techniques of Fig. 8-6 to sketch the array factor for a two-element array with equal amplitude, in-phase elements in polar form for the following spacings: (a) d31/4 and (b) d- 22. Examples 3-2 and 8-1 and this problem show the effects of spacing on an array of fixed excitation. 2π -Visible...
It is desired to design a broadside uniform linear array with the elements placed along the x-axis. The design requires a total length (edge-to-edge) of the array is 42 and the spacing between the elements must be A/2. Determine the: (a) Number of elements of the array (b) Half-power beamwidth (in degrees) for the uniform broadside array. (c) Maximum directivity (dimensionless and in dB) for the uniform broadside array. (d) Side lobe level (in dB) of the uniform broadside array....
solve part e please
69 A uniform array of 3 elements is designed so that its maximum is directed toward broadside. The spacing between the elements is /2. For the array factor of the antenna, determine (a) all the angles (in degrees) where the nulls will occur. (b) all the angles (in degrees) where all the maxima will occur. (c) the half-power beamwidth (in degrees) (d) directivity (dimensionless and in dB) (e) the relative value (in dB) of the magnitude...
Design a 19-element uniform linear scanning array with a spacing of A/4 between the ele- ments. (a) What is the progressive phase excitation between the elements so that the maximum of the array factor is 30° from the line where the elements are placed? (b) What is the half-power beamwidth (in degrees) of the array factor of part a? (c) What is the value (in dB) of the maximum of the first minor lobe? Verify using the computer program Arrays...
Question 11 Not yet answered Marked out of 1.00 p Flag question Two isotropic sources, both fed with the same amplitude and a 0 degrees phase difference, what is the minimum spacing between the elements required in order to form at least one null in the array factor: Select one: a. ob.312 O C.NA d. N2 Next page on Question 8 Not yet answered Marked out of 1. 00 p Flag question Three 5-element arrays of isotropic sources and uniform...
8.2-4 Usually, the interelement spacing of an array is about one-half wavelength. Spacings much greater than this produce major lobes in undesired directions. To illustrate this point, use the techniques of Fig. 8-6 to sketch the array factor for a two-element array with equal amplitude, in-phase elements in polar form for the following spacings: (a) d31/4 and (b) d- 22. Examples 3-2 and 8-1 and this problem show the effects of spacing on an array of fixed excitation. 2π -Visible...
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