Satya Kesh Dubey

H- Shaped Stacked Patch Antenna for Dual Band Operation

Analysis of U-slot loaded patch stacked with H-shaped parasitic elements is given in this paper. It is found that the antenna exhibits dual resonance and both the resonance frequency (upper and lower) depends directly on slot width and inversely on slot length. Both upper and lower resonance frequency increase with increasing the value of h2. Typically the bandwidth at lower and upper resonance is found 3.66% and 10.25% respectively. The radiated power at higher frequency (beamwidth 64◦) is 0.73 dB as compared to lower resonance frequency (beamwidth 71◦). The theoretical results are compared with the simulated data obtained from IE3D.

A frequency agile stacked annular ring microstrip antenna using a Gunn diode

In this paper, an analysis of a Gunn loaded stacked annular ring microstrip antenna is presented using a circuit concept. Consequently, various parameters such as input impedance, voltage standing wave ratio, return loss, band width, radiation pattern, and beam width of the antenna are evaluated as a function of bias voltage for different threshold values. It is found that the operating frequency of the Gunn loaded stacked patch is controllable with the bias voltage. The band width of the Gunn loaded stacked patch is improved to 11.61% as compared to the 9.16% band width of the stacked patch in addition to there being better matching and wider tunability. The radiated power and beam width of the stacked patch are also enhanced by loading a Gunn diode with it.

Notch loaded stacked disk patch antenna for wideband operation

In this paper the analysis of a symmetrically notch loaded stacked circular disk patch antenna is carried out. It is found that the bandwidth of notch loaded disk antenna depends directly on the notch dimensions. Bandwidth of the notch loaded patch is found to be 27. 89 %. Stacking of the patch with parasitic element further improves the bandwidth to 43.56 %. Theoretical results are compared with simulated results using IE3D, which are in close agreement.