scholarly journals A New Reconfigurable Filter Based on a Single Electromagnetic Bandgap Honey Comb Geometry Cell

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2390
Author(s):  
Andre Tavora de Albuquerque Silva ◽  
Claudio Ferreira Dias ◽  
Eduardo Rodrigues de Lima ◽  
Gustavo Fraidenraich ◽  
Larissa Medeiros de Almeida
Keyword(s):  
Communication Systems ◽  
Printed Circuit Board ◽  
Unit Cell ◽  
Circuit Board ◽  
Center Frequency ◽  
Electromagnetic Bandgap ◽  
Printed Circuit ◽  
Varactor Diodes ◽  
Intelligent Communication ◽  
Rejection Band

This work presents a new unit cell electromagnetic bandgap (EBG) design based on HoneyComb geometry (HCPBG). The new HCPBG takes a uniplanar geometry (UCPBG—uniplanar compact PBG) as a reference and follows similar design methods for defining geometric parameters. The new structure’s advantages consist of reduced occupied printed circuit board area and flexible rejection band properties. In addition, rotation and slight geometry modification in the HCPBG cell allow changing the profile of the attenuation frequency range. This paper also presents a reconfigurable unit cell HCPBG filter strategy, for which the resonance center frequency is shifted by changing the gap capacitance with the assistance of varactor diodes. The HCPBG filter and reconfiguration behavior is demonstrated through electromagnetic (EM) simulations over the FR1 band of the 5G communication network. Intelligent communication systems can use the reconfiguration feature to select the optimal operating frequency for maximum attenuation of unwanted or interfering signals, such as harmonics or intermodulation products.

scholarly journals A New Ultracompact Narrow Bandpass Microstrip Filter Using Double-Negative Quasiplanar Cells

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Mohammad Reza Khawary ◽  
Vahid Nayyeri ◽  
Seyed Mohammad Hashemi ◽  
Mohammad Soleimani
Keyword(s):  
Printed Circuit Board ◽  
High Selectivity ◽  
Bandpass Filter ◽  
Circuit Board ◽  
Center Frequency ◽  
Double Negative ◽  
Fractional Bandwidth ◽  
Printed Circuit ◽  
Full Wave ◽  
Good Agreement

This paper presents a novel ultracompact narrow bandpass filter with high selectivity. The proposed filter is composed of cascading two basic cells. Each cell is basically a microstrip line loaded with a quasiplanar resonator and series gaps which can be fabricated using a standard multilayer printed circuit board technology. The structure is analyzed through an equivalent circuit and full-wave simulations. The simulation results are compared with experimental measurements demonstrating a good agreement between them. The measurement indicates that the realized bandpass filter at the center frequency of 1 GHz has a fractional bandwidth of 2.2%. Most importantly, in comparison with other similar recent works, it is shown that the proposed filter has the smallest size.

scholarly journals Ultra-compact capacitively loaded evanescent half-mode SIW filters for LTE applications

2014 ◽  
Vol 6 (5) ◽  
pp. 487-490 ◽  
Author(s):  
Tinus Stander ◽  
Saurabh Sinha
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Center Frequency ◽  
Fractional Bandwidth ◽  
Third Order ◽  
Printed Circuit ◽  
Term Evolution ◽  
Waveguide Filter ◽  
Capacitive Loading

This paper presents a novel miniaturized substrate integrated waveguide filter by combining both half-mode resonators and capacitive loading on a conventional two-layer printed circuit board (PCB) process. The resulting synthesis is successfully demonstrated in an long-term evolution application by means of a third-order filter of <225 mm2in size while featuring 2.3 dB insertion loss over a 5.5% fractional bandwidth at 3.7 GHz. Good first-iteration agreement between simulated and measured results, both in center frequency and bandwidth, are achieved.

scholarly journals Novel modular pressure and flow rate balanced microfluidic serial dilution networks on printed circuit boards: Designs, Simulations and Fabrication

2018 ◽  
Author(s):  
Nikolaos Vasilakis ◽  
Konstantinos I. Papadimitriou ◽  
Hywel Morgan ◽  
Themistoklis Prodromakis
Keyword(s):  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Single Layer ◽  
Unit Cell ◽  
Serial Dilution ◽  
Circuit Board ◽  
Driving Mechanism ◽  
Buffer Solution ◽  
System Architectures ◽  
Printed Circuit

AbstractFast, efficient and more importantly accurate serial dilution is a requirement for many chemical and biological microfluidic-based applications. Over the last decade, a large number of microfluidic devices has been proposed, each demonstrating either a different type of dilution technique or complex system architectures based on various flow source combinations. In this work, a novel serial dilution architecture is demonstrated, implemented on a commercially fabricated printed circuit board (PCB). The proposed single layer, stepwise serial diluter comprises an optimised microfluidic network, where identical dilution ratio per stage can be ensured, either by applying equal pressure or equal flow rates at both inlets. The advantages of the proposed serial diluter are twofold. Firstly, it is structured as a modular unit cell, simplifying the required fluid driving mechanism to a single source for both sample and buffer solution. Thus, this unit cell can be seen as a fundamental microfluidic building block, which can form multistage serial dilution cascades, once combined appropriately with itself or other similar unit cells. Secondly, the serial diluter has been fabricated entirely using commercial PCB technologies, allowing the device to be interfaced with standard electronic components, if more complex miniature point-of-care (PoC) systems are desired, where the small footprint and accuracy of the device is of paramount importance.

scholarly journals Electrically Switchable Semiloop Antenna with Polarization and Pattern Diversity

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 708
Author(s):  
Yu-Jen Chi ◽  
Chien-Fang Su ◽  
Ching-Lieh Li
Keyword(s):  
Printed Circuit Board ◽  
Metal Layer ◽  
Coplanar Waveguide ◽  
Operating Mode ◽  
Circular Ring ◽  
Circuit Board ◽  
Center Frequency ◽  
Strip Line ◽  
Horizontal Polarization ◽  
Printed Circuit

This paper proposes a coplanar waveguide (CPW)-fed semiloop antenna with switchable linear polarization and radiation pattern. This design uses a novel asymmetric coplanar strip line (ACPS) circular ring to produce even or odd modes of the CPW, which can generate vertical or horizontal polarization in the semiloop antenna. The modes of the ACPS circular ring can be switched by controlling the on/off state of the PIN diode, and only a two-bit control signal is required to select the operating mode. The proposed polarization switchable antenna uses only one metal layer of the printed circuit board. The center frequency of the dual-polarization antenna was determined to be 2.45 GHz, and the −10 dB impedance bandwidths were determined to be 12.86% and 4.92% for vertical and horizontal polarization, respectively. The antenna parameters, such as the return loss, gain, and radiation patterns, are also presented for validating the proposed design.

Characteristics of Radiated Emission from a Printed Circuit Board with a Slit

2012 ◽  
Vol 132 (6) ◽  
pp. 404-410 ◽  
Author(s):  
Kenichi Nakayama ◽  
Kenichi Kagoshima ◽  
Shigeki Takeda
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Printed Circuit ◽  
Radiated Emission
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