Analysis: Physical Parameter Of Antenna

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Table 1: Physical Parameter of Antenna
S.No Description Value (mm)
1 Patch dimension (L*W) 20.91 * 16.06
2 Slot length (L1) 2.64
3 Slot width (W1) 2.64
4 Feed length 13
5 Feed width 3
6 Thickness (h) 1.6
7 Wavelength (λ) 0.0546 m
8 Frequency (fo) 3.5GHz
9 Velocity of Light (c) 3x10^8 m
Table 2: Antenna Feeding Techniques
Description Patch Feed Coaxial Feed Aperture Coupled
Feed Proximity Coupled Feed
Feed Radiation More More Less Minimum
Reliability Better Poor Good Good
Fabrication Easy Soldering and drilling needed Alignment
Required Alignment required
Impedance
Matching Easy Easy Easy Easy
Bandwidth 2-5% 2-5% 2-5% 2-5% Figure 1: Array of square shape slot antenna (3D) Figure 2: Array of square shape slot antenna (2D)
4. Performance Analysis:
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Non – reciprocal device states that, the devices which are having the properties that the forward characteristics are not equal to the reverse characteristics (i.e. S12 ≠ S21). So, same antenna can be used for Transmission and Reception of Electromagnetic Waves. Antenna is a passive device, it does not amplify the signals, and it only directs the signal energy in a particular direction in reference with isotropic antenna. Antenna Beam width is the angular width measured at the half power points of the main lobe. Large gain of antenna means narrow beam width. Polarization of EM fields describes the time variations of the time harmonic field vectors at a given points. In other words, it describes the direction of the field vectors change in time. Polarization is a time harmonic field characterizes. The equation (6) gives the beam width with respect to polarization of

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