─ A simple and novel low-loss diplexer with two folded Open-Loop Ring Resonators (OLRRs) that couple three microstrip lines is proposed. The first passband and second passband of the designed diplexer could be easily and accurately shifted to a desired frequency and construct the bandpass filters by adjusting the physical dimensions of the OLRRs. These results suggested that the proposed diplex...

A single feed compact microstrip antenna is proposed in this paper. L slit is introduced on the right edge of the patch to study the effect of the slit on radiation behavior with respect to a conventional microstrip patch. The resonant frequencies are obtained at 1.85, 2.4, 3.44 &4.31 GHz with corresponding bandwidth 10 MHz, 15.13 MHz, 35.19 MHz, 56.13 MHz and return loss of about -29.58, -14.5...

In this paper, we propose an artificial neural network (ANN) in conjunction with spectral domain formulation for fast and accurate determination of the resonant frequency and bandwidth of circular microstrip antenna with and without air gap. This neurospectral approach reduces the problem complexity. The results obtained from the neural model are in very good agreement with the experimental res...

In this paper we show the triangular geometry of the microstrip patch is one of the mostcommon shapes having a wide range application ranging from circuit elements to modernwireless antenna. In this paper we compare Cslot microstrip antenna an slotted equilateraltriangular microstrip antenna. Recent survey of open literature shows interesting developmentof this patch as novel ci...

The low cost, high efficiency, single-feed microstrip antenna with a two-layer substrate for circular polarization (CP) is presented. A new CP design of a singlefeed nearly square patch with two truncated square corners is also described here. The two-layer substrate consists of an FR4 dielectric layer and a foam layer. The effects of the foam substrate on the impedance bandwidth, axial ratio, ...

We have investigated the properties of thin copper and germanium layers in view of their use in microstrip gas chambers. It was found that ultra thin germanium layers with thicknesses of about 100 A provide surface resistivities in the order of 10 11 {10 14 /2. Such layers evaporated onto the micro structure of microstrip gas chambers manufactured on plastic or glass supports lead to a gain sta...

This paper aim to present the design technique, parameter analysis, real prototype fabrication and measurement results compare to simulation of 5.8GHz rectangular microstrip inset feed patch antenna. The antenna design calculation, simulation study and practical measurement results are well presented and compared. This study would be useful to realize low cost 5.8GHz rectangular microstrip patc...

In this paper, the design of rectangular dielectric resonator antenna (RDRA) with coaxial probe and microstrip line feed arrangements and corresponding return loss vs. frequency characteristics and radiation performance in C-band of microwave frequencies using finite integration method (CST Microwave Studio) and verified by finite element method (Ansoft High Frequency Structure Simulator) are p...

A microstrip reflectarray is a flat reflector antenna that can be mounted conformally onto a spacecraft’s outside structure without consuming a significant amount of spacecraft volume and mass. For large apertures (2 m or larger), the antenna’s reflecting surface, being flat, can be more easily and reliably deployed than a curved parabolic reflector. This article presents the study results on a...

A method for increasing the bandwidth of microstrip array antenna by adding additional resonator, which is directly – coupled to the non – radiating edges of a radiating element is narrated. The experimental result of four elements non-radiating edge directly – coupled rectangular microstrip array antenna (FNCRMAA) shows wide band with bandwidth of 15.63 %. Further extending the elements of arr...