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A novel design and analysis of circular microstrip antenna loaded with a key-shaped slot is presented. The introduction of key-shaped slot in the microstrip patch excites the additional modes which are orthogonal to each other, thus demonstrating multi-band dual polarized antenna characteristics. Also the next higher order modes manifest the broadband antenna response. For the optimization of the...
In circularly polarized radiation, the rotational orientations of the transmitter and the receiver antennas are unimportant in relation to the received signal strength. In this paper, a center square slot cut elliptical patch microstrip antenna to realize a tunable circular polarization in 1000 MHz frequency band is proposed. It yields axial ratio bandwidth of nearly 1.2% over tunable range. A rectangular...
Design and analysis of novel dual-band dual polarized D-shaped microstrip antenna is proposed. The D-shaped microstrip antenna excites TM10 and TM01 modes which are orthogonal to each other, thereby realizing dual polarized antenna characteristics. Further, another novel configuration, a vertical slot cut D-shaped patch is proposed. The slot cut D-shaped patch demonstrates triple band dual polarized...
A novel compact ultra-wideband circular ring sector printed monopole antenna with decreasing Sectoral angle and modified feeding structure is proposed. A detailed parametric study for Sectoral angle decreasing from equivalent circular monopole patch to 330° ring Sector up till 60° ring Sectoral patch is presented. With decreasing angle ultra-wide band response with increasing lower frequency of the...
Analysis and design of multi-band dual polarized circular microstrip antenna with an angular cut and pair of rectangular slot in 1000 MHz frequency range is proposed. The angular cut degenerates TMjj and TM21 resonant modes of equivalent circular patch into two orthogonal modes to yield multi-band response. Further pair of rectangular slots optimizes the input impedance at degenerated resonant modes...
This paper proposes a novel Multi-band dual polarized elliptical shaped microstrip antenna cut with square and rectangular slot. The square slot in elliptical patch degenerates patch TM11 and TM21 modes into two orthogonal modes to realize multi-band characteristics. The optimization of the input impedance at degenerated resonant modes is done by the introduction of the rectangular slot to realize...
Broadband shorted Sectoral microstrip antennas with rectangular slot for Sectoral angle increasing from 50° to 120° are proposed. In shorted patch, rectangular slot reduces the resonance frequency of shorted higher order TM1/4, 1 mode and along with fundamental shorted TM1/4, 0 mode, yields broadband response. A maximum bandwidth of nearly 2000 MHz (>70%) is realized in shorted slot cut 120° Sectoral...
With the advancement in personal mobile communication systems, need of antennas that gives ultra-wideband response has increased. In this paper a novel ultra-wide band plus shaped planar Microstrip antenna is proposed. The plus shaped structure is realized by combining two rectangular shaped planar monopole printed patches. A details parametric study to realize the ultra-wideband operation in 3 to...
Circular polarized microstrip antennas are required in applications wherein an uncertainty in the direction of received signal polarization exist. In this paper an offset slot cut circular microstrip antenna to realize circular polarization in 1000 MHz frequency band is proposed. It yields axial ratio bandwidth of 10 MHz (∼1.2%). To increase the axial ratio bandwidth its gap-coupled array configuration...
Multi-band dual polarized circular microstrip antenna cut with circular and rectangular slot is proposed. The circular slot in circular patch degenerates patch TM11 and TM21 modes into two orthogonal modes to realize multi-band characteristics. The rectangular slot helps in optimizing the input impedance at degenerated resonant modes to realize optimum bandwidth of 1 to 2% in 1000 MHz frequency range...
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