Microstrip patch antennas has many advantage due to light weight and small size, low cost but also have some disadvantage as low gain , narrow band width these are the two important parameters. This review paper describe how we can increase the performance of the patch antenna by using metamaterials or how we can improve the gain & bandwidth. Here we first provide the introduction of metamateri...

Jute textile is made from natural fibres and is known for its strength and durability. To determine if jute could be used as a substrate for microstrip antennas, its electromagnetic characteristics (permittivity and loss tangent) are measured in the band of 1 GHz to 5 GHz. The obtained data are used to compare the performances of a simple rectangular patch antenna resonating at 2.45 GHz on jute...

A stacked notched rectangular microstrip patch antenna for WLAN applications has been presented in this paper. The desired band is obtained by tuning the dimensions of notches and size of the stacked driven and parasitic patches. The same aspect ratio is maintained for both the patches and their respective notches. The bandwidth and gain of this antenna is 23.6% and 7.5dBi, respectively. Antenn...

A single high-directivity microstrip patch antenna (MPA) having a rectangular profile, which can substitute a linear array is proposed. It is designed by using genetic algorithms with the advantage of not requiring a feeding network. The patch fits inside an area of 2.54 x 0.25, resulting in a broadside pattern with a directivity of 12 dBi and a fractional impedance bandwidth of 4 %. The ante...

A reconfigurable yagi uda shaped microstrip antenna with switchable frequency is proposed. The proposed antenna has a simple structure, consisting of a square radiating patch and parasitic conductors of rectangular shape. This antenna is designed for multiband like WIMAX, GSM, GPS, FDMA and PCS. PIN diodes are used to switch frequencies between different bands depending on the state of the PIN ...

The design and performance of a circularly polarized microstrip patch antenna, for the application in Wireless Local Area Network (WLAN), are reported here. The antenna is a proximity coupled microstrip patch antenna where the radiating patch is loaded by a V-slot. This miniaturized microstrip antenna has wide bandwidth in the frequency band of WLAN and exhibits circularly polarized far field w...

The multi band microstrip antenna is realized either by placing stub on the edges of the patch or by cutting slots at an appropriate position inside the patch or by using the combination of these two methods. In this paper an analysis to study the effects of stub and slot in dual stub loaded and stub loaded pair of rectangular slot cut rectangular microstrip antennas is presented. The additiona...

In this paper, we present a fractal shape slot based patch antenna for multiband operations. The fractal shape slot is designed on the rectangular patch and the antenna is fed through a microstrip line. The proposed design and feeding technique allows the antenna to operate at multiple frequencies in the range of 120 GHz. It is demonstrated through simulation that the Return Loss (RL) values oc...

In this paper, we have investigated a printed modified circular disc monopole antenna with cross-shaped slot in radiating patch for UWB applications. The proposed antenna covers the entire UWB band (i.e., 3.1GHz to 10.6GHz) except the frequency band of IEEE 802.11a (i.e., from 5.15GHz to 5.83GHz). This UWB antenna will be of use in environments where IEEE 802.11a WLAN devices are already in ope...

In this paper, a new dual-frequency, compact antenna, which uses an H-shaped microstrip patch with a shorting pin, is described. Compared with the conventional rectangular patch antenna, this antenna can achieve both a significant reduction of antenna size and a dual-frequency operation with a single feed. More freedoms for tuning the resonant frequencies, the frequency ratio, and the input imp...