The aim of this work is to miniaturize a microstrip patch antenna resonating at 3 GHz.For purpose, defected ground structure (DGS) has been employed shift the resonance frequency an initial from 5.7 GHz by disturbing antenna's current distribution.The proposed DGS incorporated in plane under improve its performances.Finally, miniaturization up 50%, with respect conventional antenna, successfully accomplished.A prototype was fabricated FR4 substrate and tested.The measurements results were...

The miniaturization of the patch antenna has become an important issue in reducing volume entire communication system. This paper presents improved method size reduction a microstrip using genetic algorithm. shape typical rectangular is modified order to reduce it resonance frequency keeping physical constant. Indeed, initial divided into 10× 10 small uniform rectangles (Pixel), and algorithm searches, optimal configuration for desired goal. micro-strip shifted from 4. 9G Hz 2.16 GHz rate up...

A compact ultra-wideband (UWB) multiple input-multiple output (MIMO) antenna with high isolation is designed for UWB applications. The proposed MIMO consists of two identical monopole elements. To enhance the impedance matching, three slots are formed on ground plane. arc structure as well semicircle an open-end slot employed radiating elements fact which helps to extend bandwidth from 3.1 up 10.6 GHz, corresponds band. branch decoupling introduced between reduce mutual coupling. Simulation...

In this paper, the design and analysis of a compact coplanar waveguide-fed ultra wideband pentagon antenna are presented. To achieve performance, two modiflcations introduced. The flrst one is to remove small fan angle on each side ground plan, second modify sharp patch in width. optimal dimensions can be achieved by parametric analysis. exhibits very wide operating bandwidth 16.7GHz with return loss better than 10dB frequency range from 4.46GHz 21.14GHz. gain proposed 6.3dBi. This...

In this paper, we develop a small-sized mode converter with high performance, conversion efficiency and instantaneous bandwidth as 55%.This transforms energy from the TM01 first high-order towards fundamental TE11 circular waveguide The proposed structure increases free spurious operating in comparison existing results literature.An X/Ku-bands experiment prototype unit was designed, ensuring practical return losses better than 28 dB insertion less 0.1 (conversion > 98.8%) within entire...

A 4*4 multiple-input multiple-output (MIMO) antenna with compact size and good isolation is presented for UWB applications. The concept of polarization diversity here discussed employed to satisfy contemporary wireless communication systems requirements. In the proposed antenna, utilization a novel circular ripple-shaped decoupling structure matching are minimize mutual coupling inter-elements enhance adaptation. Experimental results show bandwidth range from 2.96 11.4 GHz reflection...

Use of discontinuities in microstrip lines is currently employed to improve the performance different passive circuits, including size reduction amplifiers, enhancement filter characteristics and applications suppress harmonics patch antennas. This paper presents an improved method a antenna using Defected Microstrip Structure (DMS) that it used perform serious LC resonance property certain frequency. The DMS integrated structure, therefore this keeps unchanged makes due abrupt change...

This work presents compact design of a smart beam steerable array antenna based on branch-line hybrid coupler by using meander-line and open stubs technique to achieve good performance miniature structure at 26GHz frequency band for 5G wireless communication applications. The proposed achieved an impedance bandwidth over 46% with coupling coefficient -3.48dB, isolation below -25dB reflection -24dB. result shows performance. To implement the new coupler. series-fed can produce radiation...

In this paper switched beam smart antenna systems are investigated to improve the performance of wireless networks. The microstrip technology arrays with Butler matrix topology as a beam-former is used implement system. optimum design 8×8 planar array, operating at 2.4 GHz for WLAN applications. Systems and optimization was based on computer simulations.

Microstrip patch antennas represent one family of compact that offer a conformal nature and the capability ready integration with communication system's printed circuitry. In this paper, 5.4 GHz circular polarization microstrip antenna is designed simulated. The selected dual-fed polarized antenna. consists miniaturization square 3dB hybrid coupler. array can excite both right-hand (RHCP) left-hand (LHCP) using coupler directly connected to get polarization. Circular obtained when two...

In this paper, a compact MIMO antenna with small size of 26*37.48*0.8 mm³ is proposed for polarization and spatial diversity applications. The consists two planar-monopole elements printed on one side FR-4 substrate.the are placed by distance D from each other the first configuration perpendicularly second separated ground planes. Simulation results show that configurations have bandwidth range 4.3 to 10.6 Ghz 4.4 10.4 low mutual coupling less than -10 dB -25 configurations, respectively.

A new design of a microstrip line coupler is proposed. The proposed based on butler matrix, and dedicated mainly to 5G massive MIMO feeding. presented done using the popular FR4 substrate. simulated bandwidth that ranges from 2.82 GHz 4.32 exploited, with 1.5 GHz, center frequency 3.6 GHz. simulation results show studied has high isolation as well return loss about -30.14 dB at good coupling factor. In addition, it achieves an excellent amplitude phase differences between outputs.

This paper presents the miniaturized microstrip branch-line 3dB hybrid coupler (BLHC) is designed and simulated as a platform in producing significant reduction operating frequency 2.2 GHz Long Term Evolution (LTE) application. High low impedance transmission line are used to miniaturize conventional Branch-Line Hybrid Coupler. The proposed branch utilized from meander Technique. design results of all above components validated by electromagnetic simulation (by Method Momentum using Advance...

This work presents a circular planar antenna with reconfigurable radiation pattern using parasitic patches. The of the proposed may take different modes. mode change is made PIN diodes connected in gap between central patch and A short circuit or an open can be provided by this gap. works at 5 GHz, such as 802.11a/d/n applications. goal to provide wider coverage redirecting main lobe controlling beam directions avoid interference surrounding signals.

A high-performance microstrip low-pass filter (LPF) with low cutoff frequency, negligible passband insertion loss, very sharp transition band, and deep ultra-wide stopband is designed, fabricated measured.The presented realized using three types of resonators which are coupled C-shape defected ground structure (C-CDGS), mirrored series-resonant branch loaded by radial stub high impedance line stub.A novel equivalent circuit model the C-CDGS resonator created, its corresponding parameters...

This paper describes a design of 3 GHz–12 GHz MMIC distributed Low Noise Amplifiers (LNAs) for Ultra Wideband communications systems. The proposed circuit is common source and cascode topology using standard 0.18 μm ED02AH process from OMMIC foundry. ultra-wideband LNA achieves power gain 16.9 ± 1.7 dB an average noise figure 2.9 0.58 dB. input output reflection coefficients are less than −10 dB, the reverse S12 −37dB high linearity IIP3 [4–6.2] dBm. chip area including testing pads only...

Abstract In this paper, a new method based on genetic algorithm and Minkowski Island fractal is proposed for multiband antennas. Three-antenna configurations are chosen to validate the optimization procedure. The first configuration wide-band antenna, operating in WLAN (wireless local area network) UNII-2C band. second dual-band UNII-2 bands. contrast, third tri-band antenna UNII-2, UNII-2C, UNII-3 process accelerated by using Computer Simulation Technology (CST) Application Programming...

Bandpass filters play a significant role in wireless communication systems. Transmitted and received signals have to be filtered at certain center frequency with specific bandwidth, this paper, coupled-line bandpass Filter the 6 GHz wide bandwidth of 2 GHz. type filter can used WLAN other applications for range 5-7

The present work demonstrates the design of a wideband 2 ×1 reconfigurable beam steering array for wireless communication systems.The designed antenna is powered by microstrip line and consists two rectangular-shaped radiating elements rectangular planar ground.Its dimensions are as follows: 0.67λ0 × 0.53λ0 0.03λ0.It executes three operating states turning on off PIN diodes to change direction main beam, well tilt ranging from (±30 • ) (±38 ).A progressive analysis in order enhance...