In this context of changing and challenging market requirements, Gas Insulated Substation GIS has found a broad range of applications in power systems for more than two decades because of its high reliability, easy maintenance and small ground space requirement etc. SF6 has been of considerable technological interest as an insulation medium in GIS because of its superior insulating properties, high dielectric strength at relatively low pressure and its thermal and chemical stability. SF6 is generally found to be very sensitive to field perturbations such as those caused by conductor surface imperfections and by conducting particle contaminants. The presence of contamination can therefore be a problem with gas insulated substations operating at high fields.
Download PDF Abstract Microstrip patch antenna is mostly used in modern communication devices over conventional antennas mainly because of their size. In this review paper a survey is conducted on commonly used techniques and design used in microstrip antenna papers which has been used by authors for designing of an efficient, low profile, small, compatible, affordable microstrip antenna, mainly used to designed reconfigurable, multiband and wideband antennas, after that a initiator patch design is given with dimensions on which technique will be applied for the analysis of different parameter of antenna.
A patch antenna is a narrowband, widebeam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate such as a printed circuit board with a continuous metal layer bonded to the opposite side of the substrate which forms a ground plane .
The EM waves is produced by an antenna which is so called transducer because it transform electric current in to EM waves and by receiving vice versa . Radiation of antenna by changing the current inside a conductor wire is the concept of radiations of antenna. By accelerating or decelerating the current in a straight wire, the current will create a flow which makes the antenna radiate, if current will not flow antenna never radiate .
Common microstrip antenna shapes are square, rectangular, circular and elliptical, but any continuous shape is possible. The resulting structure is less rugged but has a wider bandwidth because such antennas have a very low profile, are mechanically rugged and can be shaped to conform to the curving skin of a vehicle .
They are often mounted on the exterior of aircraft and spacecraft or are incorporated into mobile radio communications devices. Microstrip antennas are best choice for wireless devices because of characteristics like low profile, low weight, ease of fabrication and low cost.
Since it is common practice to combine several radios into one wireless and use single antenna. Microstrip antenna suffers from disadvantages like they have less bandwidth and gain .
For obtaining multiband and wideband characteristics, different techniques have been used like cutting slot in patch, fractal geometry  and DGS . In order to increase bandwidth DGS has been used. DGS may be realized by cutting shape from ground plane.
Shape can be simple or complex. When DGS has been applied to antenna equivalent inductive part due to DGS increases and this cause high effective dielectric constant hence bandwidth reduced. It is to be noted that within particular area of ground different DGS can produce different resonant frequencies and different bandwidth.
In this paper two radiating u slot in ground plane have been cut out. Hence new resonances along with effective current paths are generated in ground plane, as result wideband characteristics have been obtained . A Defect is introduced called as meander line resonator by creating defect known as band notch function.
Resonator is designed to block surface current at resonant frequency of two patch antenna. This antenna provided an improvement in isolation by 16 dB with reduced edge to edge spacing of 7 mm.
This design and simulation has been carried out using antenna simulation software. The resonator is designed to block the surface current at the resonant frequency of the two patch antennas coupled along H-plane and operating at a frequency of 4.
The interelement isolation before and after the implementation of SMLR has been investigated. In this, bandwidth of antenna is obtained by making use of u shaped patch. Conventional U slot patch antenna, parametric analysis is analyzed.
Also effect of U slot inclusion on performance of patch antenna was analyzed. Antenna was designed and simulated using HFSS simulated software and good effects were obtained between practical and experimental results.
The antenna operating frequency range is 5. It exhibits two radiation beams, directed at 35 and with 7. This antenna was obtained by cutting shapes in diagonal directions of microstrip patch antenna. A measured 3 dB axial-ratio AR bandwidth of around 0. The measured boresight gain was more than 3.
Different shapes for the slots are studied and compared, based on the fixed overall volume of the antenna for circularly polarized diagonally symmetric slotted microstrip-patch antennas.
This antenna was designed to have compact size of small dimensions.This is to certify that the thesis entitled “Design of ultra small microstrip patch antenna for wireless communication applications”, submitted by Tanya Sharma This paper presents a narrow band microstrip patch antenna for wireless communication.
A microstrip patch antenna consists of a radiating patch on one side of a dielectric. Vol.7, No.3, May, Mathematical and Natural Sciences. Study on Bilinear Scheme and Application to Three-dimensional Convective Equation (Itaru Hataue and Yosuke Matsuda).
the absence of the microstrip patch antenna Characteristics of the antenna-EBG composite operating in the receive and transmit modes in the presence of a microstrip patch antenna .
Request PDF on ResearchGate | Design and Development of a RF MEMS TCAS Patch Antenna | In this thesis the focus is on the design and development of a RF MEMS Patch Antenna which can be used as a. In this paper a dualband suspended microstrip right-angled isosceles triangular patch antenna is designed for use in microwave imaging system for breast cancer tumour detection.
Research Paper ANALYSIS AND DESIGN OF E SHAPED PATCH ANTENNA IN X BAND Alka Verma Address for Correspondence rectangular microstrip patch antenna, it becomes an E-shaped microstrip patch antenna. The E-shaped microstrip patch antenna is simpler in construction.