Bappadittya Roy

Effect of different slots in a design of microstrip antennas

A signal layer rectangular microstrip antenna embedded with open-ended and close-ended slots is presented in this paper. Two open-ended slots are introduced inside the ground plane as well as inside the patch to excite the antenna with different resonant mode. In another configuration, two close-ended slots are introduced both inside the ground plane and patch to observe the variation in resonant frequency and bandwidth of the antenna. The proposed structure showed promising results in perspective of return loss, gain, efficiency and directivity for the applications wireless communication system including IEEE 802.11a WLANs application that allocate channels between 5.15 to 5.825 GHz.

Characterization of textile substrate to design a textile antenna

The introduction of intelligent textile system to increase the wearers level of protection has exposed the necessity of wearable communication tools and has led to research in textile antennas. So-called “wearable textile systems” are intended to improve the quality of life by enhancing the wearers functionalities. Garments having the ability to monitor bio signals and communicate with the environment can, for example, provide continuous information about a persons state of health. However, wireless communication with the environment requires antennas. When preserving textile properties such as flexibility and comfort is an issue, antennas should be made fully integratable into garments and, thus, manufactured from textile material. In this paper, we describe the design, manufacture, and performance of the rectangular microstrip antenna on a textile substrate which shows the feasibility of the use of textile materials in the design of antennas working in the dedicated 831.94MHz frequency range.

UWB monopole antenna design in a different substrate using Sierpinski Carpet Fractal Geometry

In this paper an Ultra Wideband Monopole antenna is designed for various WLAN and WiMAX applications. The antenna is designed using CST Microwave Studio SuiteTM. Iterative patch structures are considered to obtain optimized result. Also obtain optimized result using different substrate. Sierpinski Carpet Geometry is applied in design of the patch structure. The finalized monopole is proposed to be applicable in the WLAN bands (5.2/5.8 GHz) and WiMAX bands (3.5/5.5 GHz). The antenna exhibits a gain of 2.8 dB, 3.6 dB, 3.8 dB and 3.9 dB at frequencies 3.5 GHz, 5.2 GHz, 5.5 GHz and 5.8 GHz respectively. The antenna exhibits a wide bandwidth of 3.5 GHz to 7.5 GHz respectively.

A coaxial fed compact rectangular microstrip antenna with multi-layer configuration for WLAN 2.4/5.2/5.8 GHZ band applications

This paper presents a co-axial fed compact rectangular microstrip antenna with multi-layer arrangement for WLAN band (2.4-2.48, 5.15-5.825 GHz) applications. The designed antenna consist of rectangular patch with two open ended L shaped slots and ground plane with of two open ended rectangular slots. The antenna with single layer arrangement shows two resonant bands in PCS (1.851GHz-1.91GHz) and WiMAX (3.287-3.934GHz) frequency range. The multi layer configuration results in two resonant states of the proposed antenna in WLAN frequency range with maximum gain around 4.96dbi.

Compact Slotted Microstrip Patch Antenna with Multiband Characteristics for WLAN/WiMAX

In this paper, we present a compact slotted microstrip patch antenna whose multiband characteristics have been studied. This antenna is compact in shape and size having a dimension of 24 × 24 mm2. This antenna consists of two inverted F-shaped slots in the patch and a defected ground plane for enhancement of impedance bandwidth. This patch is fed by a coaxial probe. The antenna shows multi band characteristics, i.e., from 1.94–1.98 GHz, 2.4–2.52 GHz, 3.2–3.38 GHz, 5.07–5.41 GHz, 5.73–6.09 GHz. After analyzing all necessary characteristics in perspective of gain, bandwidth, polarization, and return loss, the proposed patch is well applicable for WLAN (2.4/3.2/5.2/5.8 GHz) and WiMAX (5.5 GHz) communications.

Application of RCGA in Optimization of Return Loss of a Monopole Antenna with Sierpinski Fractal Geometry

This paper presents a monopole antenna design using Sierpinski triangle fractal geometry with an improved frequency response. The antenna response has been optimized using the genetic algorithmic approach. Triangular slots have been incorporated in the ground plane section, which has an effect on antenna return loss. A triangular shaped patch with Sierpinski triangle geometry has been placed above Beryllia (99.5%) substrate having an electrical permittivity of 6.5. The resonant frequency peak of proposed antenna is exactly at 2.45 GHz with an impedance bandwidth of 650 MHz. The antenna finds its application in 2.4 GHz (2.41–2.48 GHz) WLAN band with a maximum realized gain of 3.16 dBi at the resonating frequency.

A compact wideband monopole antenna designed for wireless applications

A Compact Wideband Monopole Antenna, designed for wireless applications has been investigated in this paper. The antenna consists of a Radiating Patch along with a Defected Ground Plane. The proposed antenna has been compared with a similar Radiating Patch without any Defected Ground Structure (DGS) and the results have been discussed with comparison plots. The proposed antenna covers a frequency range of 2.4 GHz to 6.0 GHz with an impedance bandwidth about 85.71 %. The proposed antenna finds its application in IEEE 502.11a WLAN band (5.15-5.85 GHz), IEEE 502.11b WLAN band (2.4-2.5 GHz) and IEEE 802.16 WiMAX band (3.2-3.5 GHz).

A novel wideband spade shaped monopole antenna with ring geometry for wireless applications

In this paper a novel wideband spade-shaped monopole antenna with ring geometry is designed for several wideband microwave applications. The antenna is designed in CST Microwave Studio Suite™ environment. Round Slot Geometry is applied in design of the patch structure. The finalized monopole is proposed to be applicable in the microwave frequency band from 4.2 GHz to 12.2 GHz. The antenna exhibits a gain of 3.4 dBi, 3.5 dBi, 3.7 dBi, 3.8 dBi, 4.6 dBi and 1.9 dBi at frequencies 5 GHz, 5.2 GHz, 5.5 GHz and 5.8 GHz, 10 GHz and 12 GHz respectively. The antenna exhibits a wide bandwidth of 8 GHz (4.2 GHz to 12.2 GHz).

An UWE monopole antenna for WLAN and WiMAX applications

In this paper an Ultra Wideband Monopole antenna is designed for various WLAN and WiMAX applications. The antenna is designed using CST Microwave Studio Suite™. Iterative patch structures are considered to obtain optimized result. The finalized monopole is proposed to be applicable in the WLAN bands (5.2/5.8 GHz) and WiMAX bands (3.5/5.5 GHz). The antenna exhibits a gain of 2.9 dB, 3.7 dB, 3.8 dB and 4.0 dB at frequencies 3.5 GHz, 5.2 GHz, 5.5 GHz and 5.8 GHz respectively. The antenna exhibits a wide bandwidth of 3.5 GHz to 7 GHz respectively.