COMPACT MICROSTRIP PATCH ANTENNA Research Papers (original) (raw)

A compact, circular UWB fractal antenna with triple reconfigurable notch rejection bands is proposed. It rejects the crowded frequency bands WiMAX, WLAN and X band interferences produced in UWB communication systems. The proposed fractal structure consists of a basic circular patch with circular fractal iterations. By employing this new structure of fractals, the overall size of antenna is reduced 53% to 21x25 mm, in comparison with traditional circular monopole antenna. The implemented antenna operates at 3.1-10 GHz. Re-configurability is realized by designing slots and split ring resonators in desired frequencies with the attached PIN diodes. WLAN band rejection was realized by creating a pair of optimized L-shaped slots in the ground plane. By etching a split ring resonator and a U-shaped slot, X and WiMAX bands were also rejected. Furthermore, by attaching diodes to aforementioned slots and designating the diodes on/off, different bands can be included or rejected. In time domain, the antenna properties are evaluated by a figure of merit called fidelity factor. Finally, the antenna properties are measured in anechoic chamber and the results agrees with simulation findings.

In the present paper a circular slot rectangular microstrip loaded antenna is proposed. The obtained bandwidth of rectangular microstrip antenna is improved up to 46.92%. The proposed antenna has frequency band in the frequency range 1.979 GHz to 3.192 GHz this frequency band is suitable for WLAN / WiMAX and other wireless communication applications. The microstrip antenna suffers from narrow bandwidth hence the present work provide an alternative solution to increase the bandwidth. The gain has been improved up to 4.68dBi and antenna efficiency is 97.63%. The proposed slot loaded Microstrip antenna is fed by 0.3 mm line feed. The proposed antenna is simulated by IE3D Zealand simulation software based on method of moments.

- by IJSRD Journal
- •
- COMPACT MICROSTRIP PATCH ANTENNA, Gain, Circular Slot, Enhance Bandwidth

A novel compact Minkowski Pre-fractal antenna is investigated to be an efficient scheme of miniaturization. Based on the simulation results, the proposed antenna has shown to posses an excellent size reduction possibility with good radiation performance for wireless applications. Compared with the conventional square patch microstrip antenna and the square microstrip antenna with two pairs of slits at edges, the presented antenna exhibits high size reduction, wider impedance-bandwidth performance and multi-frequency operation with acceptable radiation characteristics. Moreover, with the novel geometry, the designer will have a high degree of freedom that can be used to reduce further the antenna size.

Compact fractal boundary microstrip antenna is
proposed for circular polarization (CP). By replacing the sides of a
square patch with asymmetrical prefractal curves, two orthogonal
modes are excited for CP operation. The structure is asymmetric
along the principal axes ( ). The indentation parameter of
the fractal boundary curve is optimized to design compact CP
antennas. Experimental results show that 10-dB return loss and
3-dB axial-ratio bandwidths of the proposed fractal boundary
Ant 2 are 162 and 50 MHz, respectively, at operating frequency of
around 2540 MHz. Results show that an excellent CP is achieved
with a single probe feed, besides reduction in the antenna size by
applying fractal boundary concept.

- by Dr. Venkateshwar reddy
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- COMPACT MICROSTRIP PATCH ANTENNA

In this paper, an L-shape slanted dual-band microstrip patch antenna operating at the 2.1 GHz and 2.6 GHz bands for long term evolution (LTE) application is proposed. The flame-resistant type 4 (FR-4) substrate having a relative permittivity of 4.30 and loss tangent of 0.002 is considered for the design, which is probe feed by a 50-Ω microstrip, feed line. To achieve the lower band mode of 2.1 GHz and improve resonance at the upper band mode of 2.6 GHz, a slanted L-shaped slot is loaded onto the patch. Simulation results obtained using the computer simulation technology (CST) software shows that the-10 dB operation bandwidth at the 2.1 GHz and 2.6 GHz bands are 40 MHz and 110 MHz respectively. Furthermore, the gains achieved in the lower and upper resonance frequencies are 1.79 dB and 3.06 dB respectively.