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A simple and ultra wide-band patch antenna with semicircular slot and coplanar waveguide is presented in this study. Proposed antenna consist of a three forth circular patch tapered from a micro strip. This antenna is etched on a FR-4 substrate with an overall size of 31mm x 32mm x 1.6mm. Simulated results of proposed antenna are showing that it is a good candidate of UWB antenna. The proposed antenna...
This paper proposes a compact, low power high frequency trigger pulse generator circuit. Delay-introducing circuit that can incorporate a certain amount of delay during signal processing while maintaining the signal integrity is utilized in the proposed design. This paper evaluates performance of various delay-introducing circuits in terms of different design matrices. Further, this paper exploits...
In this paper, a novel design of an Octagonal shape micro strip patch antenna with switchable slots (PASS)structure is proposed to achieve polarization diversity. Two orthogonal slots are incorporated into the patch and two p-i-ndiodes are utilized to switch the slots on and off. By turning the diodes on or off, this antenna can radiate with linear and circular polarization, either right hand circular...
In this paper, a novel design of square patch antenna with a switchable polarization sense. The propose structure is reconfigurable patch antenna with polarization states being switched among linear polarization (LP), left-hand circular polarization (LHCP) and right-hand circular polarizations (RHCP). This antenna structure has four L-shaped slots on the ground plane, and the Circular Polarization...
This paper covers an extensive design and analysis of a swastik slot rectangular microstrip antenna is presented for 3G and WLAN application. The proposed antenna has dual band characteristics with single co-axial feeding technique. It is fabricated on RT Duroid having dielectric constant 2.2. We know the result of VSWR should be less than 2 for efficient radiation of signal at our desired frequency...
This paper describes the design and realization of a low noise amplifier (LNA) at 410MHz. A balanced amplifier structure which consists of hybrid coupler and amplifier has been used to realize this LNA. This approach gives the advantage of good voltage standing wave ratio, higher linearity and good stability. Noise figure of 1dB with a flatness of 0.5 dB and input-output return losses better than-15dB...
A simple, low cost and compact u-shaped antenna is proposed for UWB application with WLAN band notched characteristics. Band notched characteristics can be obtained by introducing two L-shaped slot and symmetrical step slot at the edge of the rectangular ground plane. The structure is designed on low cost FR4 substrate having dimensions 0.623λ×0.513λ×0.0293λ...
Microstrip antenna are widely used on planar surfaces but here it has been conformed to cylindrical surface at 10 GHz that finds application in missiles which can be modeled in the shape of cylinder. An inset microstripline feed has been used because of its simplicity and ease of practical manufacturing. Moreover it provides very small stray radiation from the feed. Simulation and optimization for...
In this paper, the design of compact size Micro strip patch antenna is presented at resonant frequency 2 GHz using defected micro strip structure which has various wireless communication applications. The antenna is constructed using micro strip feed line technique and fabricated using dielectric FR4 substrate which has dimensions of (35.4 mm×45.6 mm). The frequency response gives a very sharp cut...
A dual mode quarter-cut dielectric resonator based 4-pole quasi chebyshev filter having a bandwidth of 24 MHz at C-band is designed and fabricated. Dual mode application of such a miniaturized resonator for the microwave filtering purpose is a very promising technique that results in the significant miniaturization in terms of weight and footprint of the filter. Realized filter shows almost 60% reduction...
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