In this manuscript, a simple synthesis method of single square loop frequency selective surface (SSLFSS) is discussed, which may flnd the suitable application in fast analysis and fabrication frequency-selective surface. The presented technique used to design SSLFSS at 3GHz, 15GHz, 22GHz 26GHz. At every interest, analytical result very close required result. Moreover, way control re∞ection any an controlling level frequency. However, we have proposed two simple, cheaper lightweight...

Abstract The Dual-Frequency synthetic aperture radar (DFSAR) system manifested on the Chandrayaan-2 spacecraft represents a significant step forward in exploration of solid solar objects. It combines SAR at two wavelengths ( L and S bands) multiple resolutions with several polarimetric modes one lightweight (∼20 kg) package. resulting data from DFSAR support calculation 2 × complex scattering matrix for each resolution cell, which enables lunar near-surface characterization terms...

A negative refractive index material loaded patch antenna is proposed for ultra wideband applications. The operation has been achieved by creating a defected ground plane with CNC shaped split ring resonator. resonator also exhibits 90-deg electrical tilt. Two additional slots are engineered in the further bandwidth enhancement. −10 dB an order of 57.89% peak gain 5.37 dBi at 5.5 GHz resonant frequency. Measured results demonstrate good agreement simulated results.

This study describes design and development of a novel X‐band high‐efficiency broadband slotted waveguide array (SWA) antenna. Broadband nature SWA has been achieved using differential feeding mechanism which bifurcates large resonating into wideband sub‐arrays by creating virtual short. The performance such type is also compared with conventionally designed edge fed coupling slot SWA. proposed features high efficiency, power handling capacity low fabrication tolerances as conventional...

An engineered novel tunable dual-band metamaterial antenna based on stacked split ring resonator (SRR) array is presented. The μ-negative SRR present at two sublayers of microstrip patch substrate adds tuning capability to the with marginal trade-off between gain and cross-polarization. If size element considerably smaller than resonance wavelength, ideally lesser λ/10, would support resonating mode antenna. Compact embedded in radiator facilitate intended allocated spectrum L5- S-band...

In this paper the design of an X-band frequency reconfigurable patch antenna has been demonstrated using PIN diode. A square slot introduced in order to realize diode effect parameters. The tuning is realized by changing its effective electrical length, which controlled different mode applying bias voltages across it along antenna. An annular rectangular used and a gap 2mm attach When forward biased i.e closed current will flow outer ring. ±60 MHz (1.34 %) obtained voltage 3 volt. structure...

SCATSAT-1 is the IndianSpace Research Organisation's (ISRO's) newest Ku-band scatterometer which was launched on 26 September 2016 from ISRO's space-port Sriharikota on-board PSLV C35 mission.It an advanced follow-on

This communication deals with simultaneous generation of a contoured and pencil beam from single shaped reflector two feeds. A novel concept generating high gain is presented using focal plane conjugate field matching method. The generated the by introducing deformations in parabolic surface. proposes simple method to counteract effects shaping generate an additional reflector. achieved feed which axially laterally displaced point. proposed successfully applied Indian main land coverage over...

This letter is concerned with the design and analysis of a dual-polarized center-fed-shaped reflector antenna presently implemented for satellite communication. Design challenges such an have been outlined herein. A novel hybrid surface shaping technique devised that employs both global local profile variables using blend Zernike polynomials (for globalized shaping) spline functions localized shaping). TICRA POS software, physical optics (PO)-based optimizer, employed synthesis. approach...

This article demonstrates a new type of annular ring shaped cylindrical dielectric resonator (ARCDR) loaded printed ultra-wideband (UWB) antenna which is further with two-layer UWB frequency selective surface (FSS) structure. The proposed FSS helps to improve the peak gain standalone hybrid significantly (about 4.45 dB). provides measured impedance bandwidth (IBW) and about 115.5% (S11 ≤ −10 dB, 3.75 14 GHz) 10.3 dBi respectively. top layer structure employs square loop configuration...

An advanced Ku-band pencil-beam scatterometer has been developed having a scanning 1.4 m diameter Cassegrain antenna, for providing <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$3\times20$ </tex-math></inline-formula> km [for horizontal-transmit and horizontal-receive (HH) beam] notation="LaTeX">$3\times23$ (for VV beam) fundamental range-slice resolution, marked improvement over its predecessor...

Abstract This article presents the design and development of a new type wideband shared aperture dual band microstrip polarization patch antenna (MPA) operating at L&amp;S band. In this configuration, square ring shaped radiating element L printed on different dielectric substrate layers housed within S‐band has been used. The probe fed feeding mechanism is employed to get wide bandwidth performance both bands. measured 10‐dB return loss 28.3% 29.4% S‐band. simulated parameters are in...

In this paper, a simple synthesis method of the circular ring frequency selective surface has been discussed. However, proposed technique is used to design at 3GHz, 15 GHz and 26 analytical results each interest supported by simulation results, which performed using CST Microwave Studio commercially available simulator based on finite integral technique. For validation Ansoft Circuit Simulator also obtain reflection transmission coefficient through values inductance capacitance, have...

In this paper, a simple synthesis technique to obtain the geometrical parameters of modified circular ring for angular and polarizations (perpendicular parallel) stable frequency selective surface (FSS) has been discussed. The FSS structure have achieved using proposed technique, which is based on equivalent circuit (EC) approach. addition this, numerical analysis also discussed determine values EC parameters, depends basic system level characteristics such as operation...

We propose a novel miniaturized dual-band microstrip patch antenna with improved gain for potential wireless applications. Two variants of the proposed configuration have been optimized and analyzed results presented. The basic is loaded two pairs Complementary Split Ring Resonators (CSRR\'s) on both sides its non-radiating edges different dimensions sides. radiation performance first variant further by etching four CSRR ground plane which controls surface waves effectively. shows an 1.80 &...

This letter presents a novel concept for designing broadband conjugate matched feed horn to cancel the high unwanted cross-polar components generated because of offset reflector geometry having low F/D and angle. A new kind symmetrical cascaded discontinuities is proposed in circular waveguide operation feed. The designed has been used illuminate an parabolic antenna, secondary radiation patterns have computed. designs feeds presented different F/D's. Significant improvement cross...

This letter is concerned with design and development of a new dual-band multimode profiled smooth-walled horn (DBPH) at Ku-band (uplink downlink frequency bands). The analyzed optimized using mode-matching-technique-based software (Mician ¿ Wave wizard). Predicted radiation patterns properties the DBPH are compared to corresponding measured results showing good agreement. Relatively higher edge coverage (EOC) gain low cross-polar level EOC achieved by synthesizing order modes TE <sub...

A sectoral Sierpinski Gasket fractal (SSGF) antenna is proposed for dual-band operation with wide-bandwidth covering GPS, DCS-1800, PCS-1800, UMTS, IMT-2000, Wireless broadband Internet Services (WiBro), Bluetooth, and WLAN bands. The SSGF consists of volume 65.5 × 27 1.6 mm3. To analyze its performance, measurements are carried out. model exhibits resonances in 1.51–3.39 GHz (2:1 VSWR BW 76.6%) 5.31–6.32 17.3%) bands 2.5–5 dBi gain. Very good agreement obtained between simulation...

A wideband ultrathin frequency selective surface (FSS) structure is designed and developed for the complete X-band. The design employs a metallic tetra-arrow (two bidirectional arrows placed diagonally) circular split (metallic) in top side bottom of RT duroid 5880LZ low-loss substrate respectively. proposed has novel contribution terms significant reduction electrical thickness (0.007λ0 which corresponding to lowest operating frequency, 8.3 GHz) wider transmission (S21) bandwidth (measured:...

Abstract This paper presents the design and analysis of a wideband X/Ku Ku band reflectarray antenna. The proposed unit cell antenna comprises patch loaded with two distinct slots, viz. square ring cross loop, printed on low loss substrate, which is backed by foam-loaded ground plane. element offers linear large dynamic reflection phase range, achieved optimizing shape, location, geometrical parameters slots patch. A 324 microstrip size 200 × mm 2 constructed analyzed for its radiation...

In this paper, the analysis and simulation of a novel geometrical structure frequency selective surface (FSS), which has been achieved through conductive loading simple circular ring with wedge-shaped metal vanes discussed. The electrical performance behavior proposed have studied in Ku band (12–18 GHz) electromagnetic spectrum for satellite communication. We radially optimized to enhance performance, such as reflection transmission bandwidth. also discussed effect incident electric field at...

In this paper, the transmission/reflection characteristics of a circular ring frequency selective surface (FSS) has been discussed. We have also explored method for computing various structure parameters surface. The analytical results proposed are comparable to that desired result. This process computation is extended bandpass and obtained close results. computed compared with simulated, which performed by using CST Microwave Studio commercially available simulator based on finite integral...

This paper presents a new waveguide shunt-slot feed for microstrip patch antenna that is analyzed using formulation based on the method-of-moments (MoM). Starting from generalized formulation, expressions are obtained rectangular radiator excited by slot entire-domain basis functions with Galerkin procedure to obtain moment matrix. Expressions dielectric region derived Green's function in Fourier transform domain. The developed analysis used prototype C-band presenting details. Subsequently,...

This paper reports a frequency selective surface with three closely spaced resonances in reflection band. The unit cell element for the designed (FSS) has two layers of circular loop patches on dielectric, stacked foam. band developed FSS is Ka and transmission bands are S Ku bands. Analysis results show that all range -35 dB to -45 it ≤ -0.15 dB, -0.25 dB. Very close second first resonance ratio 1.2 third 1.36, have been achieved. Also 1.3, which very less. shows good polarization angle...

In order to meet the miniaturization of portable communication equipment, researchers have given much attention recently compact microstrip antennas. Conventional antennas in general a conducting patch printed on grounded microwave substrate, and attractive features low profiles, light weight, easy fabrication, conformability mounting hosts. However, inherently narrow bandwidth, bandwidth enhancement is usually demanded for practical applications. Thus, present paper discusses about novel...