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1953 documents found for International Journal
MRF volume 15 issue 10 Cover and Back matter
Audrey Martin
Published online : 01-12-2023
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MRF volume 15 issue 10 Cover and Front matter
Audrey Martin
Published online : 01-12-2023
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IJMWT special issue on the 2022 French Microwave Days
Audrey Martin
Published online : 01-12-2023
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Compact wideband filtering Balun Based on SISL Technology
Yongliang Zhang, Huan Zhou, Linping Feng, Xianfang Zhang, Xiaoping Zhang, Weimin Shi
Published online : 01-12-2023
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A new compact wideband filtering balun based on substrate-integrated suspended line technology is presented in this brief. The proposed device is composed of a g/4 suspended stripline open-circuited stub, a g/2 suspended stripline resonator, and a g/2 suspended slotline resonator. These striplines and slotline are encapsulated in an electromagnetic (EM) shielding box consisting of air cavity, surr
MF, ZF, and MMSE filters for automotive OFDM radar
Bochra Benmeziane, Jean-Yves Baudais, Stéphane Méric, Kevin Cinglant
Published online : 01-12-2023
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The delay estimation for orthogonal frequency division multiplexing automotive radars can be achieved through the use of different filters. This paper compares two of these filters, namely the matched filter and the zero forcing filter through two metrics, which are the peak to side lobe ratio and the integrated side lobe ratio estimated on their range profiles. The analysis is then extended to th
Ultra-Wideband Six-Port Network Miniaturization?Matching
Tzichat M. Empliouk, Petros I. Bantavis, Christos I. Koltsidas, Theodoros N. F. Kaifas, George A. Kyriacou
Published online : 01-12-2023
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In this paper, a new design approach for the six-port (SP) junction is introduced. The proposed design includes a generalized broadband matching and smooth miniaturization scheme and is extendable for any passive multiport structure. A multilayer technology and a microstrip to slot coupling operation are employed for the designed SP, which comprises power divider and three hybrid couplers. The con
Compact beamforming network for producing multiple orthogonal beams in a limited field of view phased array antenna
Elham Sharifi Moghaddam, Arash Ahmadi
Published online : 01-12-2023
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Due to the advent of high-throughput communication satellites in a geostationary orbit, the development of multiple beam phased array antenna (MBPAA) technology has become a necessity. This paper presents the design and implementation of the constituent unit of a beamforming network (BFN), which feeds an MBPAA with interleaved sub-arrays. The proposed BFN generates multiple orthogonal sub-beams wi
A modified Jerusalem microstrip filter and its complementary for low phase noise X-band oscillator
Hamed Nimehvari Varcheh, Pejman Rezaei, Sina Kiani
Published online : 01-12-2023
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This article shows the design of two different low phase noise (LPN) planar X-band frequency oscillators using two various microstrip filters (MFs). These two MFs act as a frequency stabilization part in the loop of the microwave oscillator. The first one, the modified Jerusalem MF (MJ-MF), is based on the Jerusalem scheme. The second one, the complementary modified Jerusalem MF (CMJ-MF), is compl
Small-size multiband printed monopole antenna for wireless applications
Pranjalee Mishra, Kishor D. Kulat
Published online : 01-12-2023
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A small-size multiband antenna with 14 bands is presented in this paper for wireless applications. The studied antenna mainly consists of a folded monopole antenna and an M-shaped structure. Furthermore, the antenna has a simple design with a compact dimension of 26.8 × 10.8 mm. The studied antenna is printed on FR4 substrate with a depth of 0.8 mm and fed by a coaxial cable. The ?10 dB bandwidths
Wideband quasi-reflectionless bandstop filters using open/shorted coupled lines
Yijun Weng, Wenjie Feng, Sha Xu, Gaungxu Shen, Yongrong Shi, Wenquan Che
Published online : 01-12-2023
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Two wideband bandstop filters (BSFs) for single and dual-band are proposed and then extended to reflectionless BSFs based on the analysis from input impedance/admittance perspective. Also, topologies of higher-number-stopband input-reflectionless BSF are provided to broaden the design scope. Open/shorted coupled lines are adopted to obtain multi transmission zeros and desired stopband bandwidth by
A miniaturized UWB bandpass filter with tunable cut-off frequencies employing rectangular open-loop defected ground structure
Ravi Prakash Verma, Bhagirath Sahu, Ashish Gupta
Published online : 01-12-2023
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This article presents a compact rectangular impedance resonator (RIR)?based ultra-wideband bandpass filter with an improved reflection coefficient within the passband and controllable cut-off frequencies. The proposed filter consists of anti-parallel coupled RIR coupled with rectangular open-loop defected ground structure (ROL-DGS) etched on the ground plane. The ROL-DGS ensures better in-band and
Radio wave propagation analysis with dominant path model using MIMO antenna element for vehicular base station application
Vadlamudi Roja, Sriram Kumar D.
Published online : 01-12-2023
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A low-profile slant ±45° polarized antenna for a 4G/5G base station with a dominant path wave propagation model (DPM) is reported in this paper. For dual-polarization and wide impedance bandwidth, the two dipole radiators are crisscrossed and a square metallic ring is integrated with the dipole arms and screwed with the four shorting vias. The antenna operates in Band 40/41/42/43 with strong isola
RF sensor dedicated to the dielectric characterization of spheroids between 500 MHz and 20 GHz
Olivia Peytral-Rieu, David Dubuc, Katia Grenier
Published online : 01-12-2023
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To achieve better accuracy in their investigations, biologists have recently been using three-dimensional models as intermediates between two-dimensional cell culture and the in vivo study of tissues. Some of these models are based on spheroids, which are cellular aggregates retaining many characteristics of in vivo behaviors while being still easy to use and implement in labs. To study such objec
Adaptive digital predistortion based on Feedback?Wiener Model for aeronautical applications
Tayeb H. C. Bouazza, Smail Bachir, Matthieu Pastore, Claude Duvanaud
Published online : 01-12-2023
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In this work, a new adaptive digital predistorter (DPD) is proposed to linearize radio frequency power amplifiers (PA). The DPD structure is composed of two sub-models. A Feedback?Wiener sub-model, describing the main inverse nonlinearities of the PA, combined with a second sub-model based on a memory polynomial (MP) model. The interest of this structure is that only the MP model is identified in
Phase nonlinearity reduction of a complex receiver having multiple phase correlators
Mahadev Sarkar, B. R. Raghu, R. Sivakumar
Published online : 01-12-2023
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This article analyzes and describes phase nonlinearity reduction techniques in detail for ultra wideband complex receivers to qualify airborne system requirements. Phase nonlinearity directly affects the final frequency resolution coming from unknown threats. Thereby, the reduction of phase nonlinearity of all radio frequency (RF) channels including phase correlators is very essential. A simple ph
A simple design method for broadband planar antennas
RongLin Li, Zhenkai Yang, Yang Zhang, Yuehui Cui
Published online : 01-12-2023
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A simple process for the design of broadband planar antennas is presented for base station applications. The process is based on a square patch above a ground plane. Only three geometric parameters are involved in the design of a dual-polarized broadband planar antenna, including the width () of the square patch, a trimming angle () of the square, and the height () of the patch above the ground pl
A 1-bit reconfigurable intelligent metasurface-based antenna design for 5G application
Yajun Zhou, Lianfeng Chen, Qifei Zhang, Hao Wang, Linyan Guo
Published online : 01-12-2023
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A 1-bit reconfigurable intelligent metasurface-based antenna for 5G application is proposed. The proposed antenna based on artificial electromagnetic metamaterial has the advantages of easy processing and low cost. This meets the requirements of future communication network development. This antenna shows that the unit cell has a stable 180° phase difference between the ON and OFF states by loadin
A multiband truncated patch antenna based on EBG structure for IoMT and 5G networks
Saurabh Raj, Piyush Kumar Mishra, Vijay Shanker Tripathi
Published online : 01-12-2023
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In this paper, a truncated patch antenna based on the electromagnetic band gap (EBG) structure has been proposed. The fabricated antenna has five operating frequencies at 10.4, 15.68, 19.68, 27.2, and 35.04 GHz. The fabricated prototype of the antenna constitutes a truncated rectangular patch etched with the shape of a symmetrical slot (on top) and an EBG loaded on the ground plane of the dielectr
Highly selective, fractal-configured UWB-FSS for sub-6 GHz 5G, GSM, WLAN, and C band electromagnetic stealth application
Chandranath Chattopadhyay, Srimita Coomar, Santanu Mondal, Rajarshi Sanyal
Published online : 01-12-2023
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A miniaturized and flexible frequency-selective surface (FSS) has been presented in this article with a unit cell size of 0.049 × 0.049 where is the free space wavelength at the lower cut-off frequency. In order to achieve an ultra-wide (?3 dB) second order pass band of 151.3% with enhanced selectivity factor of 0.887, a cascaded triple layered hybrid resonating structure has been proposed with
Computer simulation, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications
Islam Islamov, Mehman Hasanov, Bayram Ibrahimov, Agil Movsumov
Published online : 01-12-2023
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The article is devoted to computer modeling, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications. The paper proposes an iterative method for the amplitude-phase synthesis of an antenna array according to the requirements for the envelope of the side lobes. The proposed method allows to determine the complex amplitudes of th
Design of miniaturized single and dual-band bandpass filters using diamond-shaped coupled line resonator for next-generation wireless systems ? ERRATUM
Bilal Mushtaq, Sohail Khalid
Published online : 01-12-2023
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MRF volume 15 issue 9 Cover and Front matter
Published online : 01-11-2023
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MRF volume 15 issue 9 Cover and Back matter
Published online : 01-11-2023
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System architecture for a compact high range resolution frequency comb OFDM radar ? ERRATUM
Alexander Quint, Benjamin Nuss, Axel Diewald, Thomas Zwick
Published online : 01-11-2023
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Highly miniaturized wideband angular stable linear?circular and linear?cross polarization converter for Ka-band satellite applications
Mohammad Abdul Shukoor, Sukomal Dey
Published online : 01-11-2023
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This work proposes a novel, extremely miniaturized wideband linear?circular and linear?cross metasurface-enabled reflective polarizer. This design comprises a Meander-line structure with horizontal dipoles as the top frequency selective surface, printed on a 1 mm thin-grounded FR-4 substrate. The /-polarized incident electromagnetic wave is converted as circularly polarized from 10.60 to 10.92 GHz
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