Showing 5 results for Compact
M. Hajebi, M. Danaeian, E. Zarezadeh,
Volume 13, Issue 3 (9-2017)
Abstract
Using composite right-left handed (CRLH) transmission line concept, a novel miniaturized dual notch band filter (DNBF) is proposed. The suggested DNBF consists of an interdigital transmission line (ITL), split ring resonators (SRRs) and complementary split ring resonators (CSRRs). Since the resonance frequency of the SRRs and CSRRs are quite independent of each other, the dual notch bands of the proposed filter can be separately controlled and shifted by changing the dimension of the SRRs and CSRRs. In this paper, the reject bands are designed for WLAN (2.4 GHz) and WiMAX (3.5 GHz) to reject these frequency bands from the ultra-wide band communication systems. The simulation results show that the transmission response has more than 32 dB rejections near each band. To validate the design concept, the proposed NBPF has been fabricated and tested. Experimental verification is provided and good agreement has been found between simulation and measurement. To the best of our knowledge, the proposed NBPF is more compact in comparison with other reported filters.
M. A. Trimukhe, B. G. Hogade,
Volume 15, Issue 2 (6-2019)
Abstract
In this paper a particle swarm optimization (PSO) algorithm is presented to design a compact stepped triangle shape antenna in order to obtain the proper UWB bandwidth as defined by FCC. By changing the various cavity dimensions of the antenna, data to develop PSO program in MATLAB is achieved. The results obtained from the PSO algorithm are applied to the antenna design to fine-tune the bandwidth. Bandwidth optimization for ultra-wideband frequency of 3.1 GHz to 10.6 GHz is achieved by applying PSO algorithm. High-Frequency Structure Simulator (HFSS) software tool is used for the simulation. An optimized antenna is fabricated, tested and test results are found in accordance with simulation results.
M. Srivastava, K. Bhardwaj,
Volume 15, Issue 3 (9-2019)
Abstract
In this paper two R‑L network simulator configurations employing a single VDDIBA, one resistance and one grounded capacitance are presented. The first configuration is a grounded series resistor-inductor (R‑L) network simulator and the second configuration is intended for grounded parallel resister-inductor (R‑L) circuit simulation. Both the proposed circuits enjoy several beneficial features such as: 1) compact structure employing only one VDDIBA and two passive elements, 2) electronic tuning of inductive part of realized series/parallel R‑L impedances, 3) independent control of inductive and resistive parts of realized parallel R‑L impedance, 4) no requirement of any component matching, and 5) un-deviated performance in non-ideal environment. By choosing appropriate values of active/passive elements, a series R‑L circuit for simulating resistance of 7.742 kΩ and inductance of value 7.742 mH has been developed. Similarly a parallel R‑L simulation circuit to simulate a resistance of value 1 kΩ and inductance of value 77.4 µH is implemented. To study the influence of parasitics on developed lossy inductances, the behavior of these configurations has been studied keeping terminal parasitics of VDDIBAs under consideration. To check the performance and usefulness of the proposed configurations some second-order filtering circuits have been designed. To confirm the theoretical analysis, PSPICE Simulation results have been included.
A. Jelodar, M. Soleimani, S. H. Sedighy,
Volume 16, Issue 2 (6-2020)
Abstract
A new four elements compact antenna array is presented and discussed to achieve enhanced phase resolution without sacrificing the array output power. This structure inspired by the Ormia Ochracea’s coupled ears. The analogy between this insect acute directional hearing capabilities and the electrically compact antenna array is used to enhance the array sensitivity to direction of arrival estimation of an electromagnetic wave. This four elements biomimetic compact array is composed of four strongly coupled antenna elements and two external coupling networks which are designed to enhance the phase resolutions between all antenna element outputs without decrease in the array output power. In other words, this four elements compact array extracts the same power level from the incident EM wave compared with regular array, while the output phase sensitivity is significantly enhanced. The simulation results confirm the advantages of this new compact array compared with the previously reported ones in the literature.
Shivanand Konade, Manoj Dongre,
Volume 20, Issue 2 (6-2024)
Abstract
The proposed research presents a two-port compact Multiple Input Multiple Output (MIMO) antenna for Ultra-Wide Band (UWB) applications. The designed antenna has two identical radiators and has an overall dimension of 20 × 44.1 × 1.6mm3 on a FR4 substrate. The designed antenna is fed by a 50-microstrip line. Extended F-shaped stubs are introduced in the shared ground plane of the proposed antenna to produce high isolation between the MIMO antenna elements. Extended F-shaped stubs are introduced in the ground plane to produce multiple resonance and high isolation between the radiating elements. The antenna offers good impedance matching in the UWB band. The proposed antenna has lower isolation < -25 dB and Envelope Correlation Coefficient (ECC) < 0.015 from 3.1 to 10.6 GHz. Antenna parameters are evaluated in term of return loss, ECC, Diversity Gain (DG), gain, Total active reflection coefficient (TRAC) radiation pattern and isolation. The proposed antenna is tested and fabricated. However, obtained results are good agreement which make suitable for UWB wearable applications.
