NOPR Collection:

Effects of tuning stub on microstrip patch antenna

2014-01-16T16:42:45Z

Title: Effects of tuning stub on microstrip patch antenna Authors: Roy, Surendra Kumar; Jha, Lalan Abstract: Use of tuning stubs to trim the phase of a microstrip feed line or to tune the resonant frequency of a microstrip patch antenna is discussed in this paper. The variation of resonant frequency with stub-length of microstrip patch antenna is also discussed. The experimental results regarding phase shift and resonant frequency with stub-length are in good agreement with the theoretical results. Page(s): 139-141

Effect of dielectric and conducting corner reflectors on V -slot waveguide antenna*

2014-01-15T16:43:10Z

Title: Effect of dielectric and conducting corner reflectors on V -slot waveguide antenna* Authors: Makal, B S; Vani, R M; Hadalgi, P M; Mulgi, S N; Hunagund, P V Abstract: This paper presents the effect of dielectric and conducting material corner reflectors (CRs) on the antenna parameters of V-slot waveguide antenna (V-SWGA). The beam is sharpened only at optimum angle (θ) and position (d) of CR from V-SWGA. The conducting material is more effective than the dielectric material CR in sharpening the beam of V-SWGA. Page(s): 135-138

Parametric study of temperature sensitivity for microstrip patch antenna

2014-01-15T16:39:53Z

Title: Parametric study of temperature sensitivity for microstrip patch antenna Authors: Roy, Surendra Kumar; Jha, Santosh Kumar; Jha, Lalan Abstract: Microstrip substrates were exposed to large temperature variations and their temperature dependent properties were measured. A parametric study of the temperature sensitivity for circular microstrip patch antenna utilising a substrate with a lower dielectric constant and thermal coefficient is found to be less sensitive to the temperature variations. Page(s): 131-134

Theoretical analysis of linear array antenna of stacked patches

2014-01-15T16:43:03Z

Title: Theoretical analysis of linear array antenna of stacked patches Authors: Pandey, Vijay K; Vishvakarma, Babau R Abstract: A linear four-element stacked array antenna is analyzed. It is observed that stacked element array antenna shows marked improvement in the bandwidth and gain over the single-element array antenna. The bandwidth of the stacked antenna array improves to 14.8% over the 4% bandwidth of the single-element array antenna, whereas the radiated power is enhanced by 0.82 dB as compared to the single-element array antenna. It is further observed that the resonance frequency, gain and directivity are highly dependent on the thickness and permittivity of the upper substrate. Page(s): 125-130