Modern Characterization of Electromagnetic Systems and its Associated Metrology. Magdalena Salazar-Palma

ports 1 and 9 of the multic...

      9 Chapter 9Figure 9.1 The anechoic chamber with the AUT on a rollover azimuth position....Figure 9.2 A top view of the antenna measurement system. The metal plate has...Figure 9.3 Comparison of the radiation pattern measured in the non‐anechoic ...Figure 9.4 Plot of S₂₁(f, ϕ), the input‐output frequency response for e...Figure 9.5 Plot of the temporal response S₂₁(t, ϕ) for each azimuth ang...Figure 9.6 The computed set of complex coefficients a_n that fits the data fo...Figure 9.7 Plot of the temporal pattern using the retained set of coefficien...Figure 9.8 S ₂₁(t ', ϕ), the time domain data using FFT after truncatin...Figure 9.9(a) Amplitude pattern reconstruction using the Chebyshev Polynomia...Figure 9.9(b) Result of the pattern reconstruction using the FFT‐based metho...Figure 9.10(a) Phase reconstruction using the Chebyshev Polynomials.Figure 9.10(b) Phase reconstruction for the above pattern using the FFT‐base...Figure 9.11 The spherical NF measurement setup with a missing data in the in...Figure 9.12 A horn antenna for the frequency 1.55 GHz. (a) Aperture of the h...Figure 9.13 Real part of E_θ for ϕ = 90^∘ on a NF measuring su...Figure 9.14 Radiation pattern of the horn antenna for the plane ϕ = 0^∘...Figure 9.15 Radiation pattern of the horn antenna for the plane ϕ = 90^∘...Figure 9.16 Radiation pattern of the horn antenna for the plane ϕ = 90^∘...Figure 9.17 Radiation pattern of the horn antenna on the plane θ = 90^∘...Figure 9.18 A 2‐element microstrip patch array operating at 3 GHz. (a) Patch...Figure 9.19 Real part of E_θ for ϕ = 90^∘ on a NF measuring su...Figure 9.20 Radiation pattern of the microstrip array on the plane ϕ = ...Figure 9.21 Radiation pattern of the microstrip array on the plane ϕ = ...Figure 9.22 Imaginary part of E_θ for ϕ = 90^∘ on a NF measuri...Figure 9.23 Radiation pattern of the microstrip array on the plane ϕ = ...Figure 9.24 A parabolic antenna operating at a frequency 1.55 GHz.Figure 9.25 Real part of E_θ for ϕ = 110^∘ on a NF measuring s...Figure 9.26 Imaginary part of E_θ for ϕ = 90^∘ on a NF measuri...Figure 9.27 Radiation pattern of the horn antenna on the plane ϕ = 90^∘...Figure 9.28 Zenith‐directed parabolic reflector with a spherical near‐field ...Figure 9.29 Interpolation of the real part of E_θ for ϕ = 0°.Figure 9.30 Interpolation of the imaginary part of E_θ for ϕ = 0°.Figure 9.31 Interpolation of the real part of E_θ for ϕ = 90°.Figure 9.32 Interpolation of the imaginary part of E_θ for ϕ = 90°.Figure 9.33 Interpolation of the real part of E_φ for ϕ = 0°.Figure 9.34 Interpolation of the imaginary part of E_φ for ϕ = 0°.Figure 9.35 Interpolation of the real part of E_φ for ϕ = 90°.Figure 9.36 Interpolation of the imaginary part of E_φ for ϕ = 90°.Figure 9.37 Comparison between the original far‐field and interpolated far‐f...Figure 9.38 Rotated parabolic reflector antenna.Figure 9.39 Interpolation of the real part of E_θ for ϕ = 0°.Figure 9.40 Interpolation of the imaginary part of E_θ for ϕ = 0°.Figure 9.41 Interpolation of the real part of E_θ for ϕ = 90°.Figure 9.42 Interpolation of the imaginary part of E_θ for ϕ = 90°.Figure 9.43 Interpolation of the real part of E_φ for ϕ = 0°.Figure 9.44 Interpolation of the imaginary part of E_φ for ϕ = 0°.Figure 9.45 Interpolation of the real part of E_φ for ϕ = 90°.Figure 9.46 Interpolation of the imaginary part of E_φ for ϕ = 90°.Figure 9.47 Comparison between the original far‐field and the interpolated f...Figure 9.48 Extrapolation of the real part of E_θ for ϕ = 0°.Figure 9.49 Extrapolation of the Imaginary part of E_θ for ϕ = 0°.Figure 9.50 Extrapolation of the real part of E_θ for ϕ = 90°.Figure 9.51 Extrapolation of the imaginary part of E_θ for ϕ = 90°.Figure 9.52 Extrapolation of the real part of E_φ for ϕ = 0°.Figure 9.53 Extrapolation of the imaginary part of E_φ for ϕ = 0°.Figure 9.54 Extrapolation of the real part of E_φ for ϕ = 90°.Figure 9.55 Extrapolation of the imaginary part of E_φ for ϕ = 90°.Figure 9.56 Comparison between the original far‐field and the extrapolated f...Figure 9.57 Extrapolation of the real part of E_θ for ϕ = 0°.Figure 9.58 Extrapolation of the imaginary part of E_θ for ϕ = 0°.Figure 9.59 Extrapolation of the real part of E_θ for ϕ = 90°.Figure 9.60 Extrapolation of the imaginary part of E_θ for ϕ = 90°.Figure 9.61 Extrapolation of the real part of E_φ for ϕ = 0°Figure 9.62 Extrapolation of the imaginary part of E_φ for ϕ = 0°.Figure 9.63 Extrapolation of the real part of E_φ for ϕ = 90°.Figure 9.64 Extrapolation of the imaginary part of E_φ for ϕ = 90°.Figure 9.65 Comparison between original and extrapolated far‐field.

      10 Chapter 10Figure 10.1 Antenna measurement carried out in an anechoic chamber.Figure 10.2 A diagram for the radiation pattern measurement system.Figure 10.3 Multiple reflections exist between the AUT and the probe in the ...Figure 10.4 Model of the measurement system with one PEC plate as the reflec...Figure 10.5 Dimensions of the helical antenna with a reflecting plate (AUT)....Figure 10.6 Dimensions of the 6‐element Yagi antenna (AUT).Figure 10.7 Dimensions of the horn antenna which is used as a probe.Figure 10.8 Current distribution on the feed dipole of the helical antenna w...Figure 10.9 Amplitude pattern for the horn antenna with one PEC plate as the...Figure 10.10 Phase pattern for the horn antenna with one PEC plate as the re...Figure 10.11 Amplitude of the environmental effects when one PEC plate is us...Figure 10.12 Amplitude pattern for the helical antenna with one PEC plate as...Figure 10.13 Phase pattern for the helical antenna with one PEC plate as the...Figure 10.14 Amplitude pattern for the Yagi antenna with one PEC plate as th...Figure 10.15 Phase pattern for the Yagi antenna with one PEC plate as the re...Figure 10.16 Model of the measurement system with two PEC plates as the refl...Figure 10.17 Current distribution on the feed dipole of the helical antenna ...Figure 10.18 Amplitude pattern for the horn antenna with two PEC plates as t...Figure 10.19 Phase pattern for the horn antenna with two PEC plates as the r...Figure 10.20 Amplitude of the environmental effects when two PEC plates are ...Figure 10.21 Amplitude pattern for the helical antenna with two PEC plates a...Figure 10.22 Phase pattern for the helical antenna with two PEC plates as th...Figure 10.23 Amplitude pattern for the Yagi antenna with two PEC plates as t...Figure 10.24 Phase pattern for the Yagi antenna with two PEC plates as the r...Figure 10.25 Model of the measurement system with four PEC plates as the ref...Figure 10.26 Current distribution on the feed dipole of the helical antenna ...Figure 10.27 Amplitude pattern for the horn antenna with four PEC plates as ...Figure 10.28 Phase pattern for the horn antenna with four PEC plates as the ...Figure 10.29 Amplitude of the environmental effects when four PEC plates are...Figure 10.30 Amplitude pattern for the helical antenna with four PEC plates ...Figure 10.31 Phase pattern for the helical antenna with four PEC plates as t...Figure 10.32 Amplitude pattern for the Yagi antenna with four PEC plates as ...Figure 10.33 Phase pattern for the Yagi antenna with four PEC plates as the ...Figure 10.34 Model of a parabolic reflector antenna with its feeding structu...Figure 10.35 Amplitude pattern for the parabolic reflector antenna.Figure 10.36 Phase pattern for the parabolic reflector antenna.Figure 10.37 Amplitude pattern for the new parabolic reflector antenna.Figure 10.38 Phase Amplitude pattern for the new parabolic reflector antenna...Figure 10.39 Model of the measurement system with a Yagi as the probe.Figure 10.40 Amplitude pattern for the horn antenna system with a Yagi as th...Figure 10.41 Phase pattern for the horn antenna system with a Yagi as the pr...Figure 10.42 Amplitude pattern for the helical antenna with a Yagi as the pr...Figure 10.43 Phase pattern for the helical antenna with a Yagi as the probe....Figure 10.44 Amplitude pattern for the Yagi antenna with a Yagi as the probe...Figure 10.45 Phase pattern for the Yagi antenna with a Yagi as the probe.Figure 10.46 Model of the measurement system with a parabolic reflector as t...Figure 10.47 Amplitude pattern for the horn antenna with a parabolic reflect...Figure 10.48 Phase pattern for the horn antenna with a parabolic reflector a...Figure 10.49 Amplitude pattern for the parabolic reflector antenna with a pa...Figure 10.50 Phase pattern for the parabolic reflector antenna with a parabo...Figure 10.51 Model of the measurement system with a dipole as the probe.Figure 10.52 Amplitude pattern for the horn antenna with