Low-Cost Compact Hairpin Filter Integrated with a Diamond Antenna for Wireless and 5G Sub-6 GHz Applications

Abstract

A new compact microstip filtering Diamond Antenna (DA) is presented in this article for possible applications in the Fifth-Generation (5G) at the n77-band (3.3 GHz-4.2 GHz), such as, Fixed Satellite Service (FSS) which is a radiocommunication system between fixed earth stations utilizing one or more satellites. The structure is implemented on an FR4 Epoxy substrate wich has a dielectric constant ϵ r = 4.4, a loss tangent tan(δ) = 0.025 and a thickness h equal to 1.6 mm. The substrate has a small size of 39.7 × 30 × 1.6 mm 3 which make it suitable to be integrated in various intelligent systems. A good results are obtained with this design, starting with the reflection coefficient S 11 which is equal to -22.31 dB at the first resonant frequency 3.57 GHz and -34.41 dB at the second resonant frequency 4.10 GHz. Several other results will be presented and discussed later in this article. The software used for the simulation is High-Frequency Structure Simulator (ANSYS HFSS) which employs the finite element approach. A prototype of the filtenna (filtering Antenna) was fabricated and measured using the Vectorial Network Analyzer 3656D (VNA).

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

“…The applications for hairpin filters are large and varied. They are commonly used in communication systems such as mobile and satellite communications [30,31]. For example, in radar systems, hairpin filters are used to process received signals, filtering out unwanted frequencies to improve the accuracy and reliability of the radar [32][33][34].…”

Highly selective dual-band interdigital bandpass filter for C-band applications

“…These metallic strips called resonators are folded or coupled together to generate filtering functions [6]- [8]. Planar filters can be integrated with microstrip antennas and form single multifunctional devices capable of filtering and radiating which simplifies the communication chain and reduces interconnection loss [9]- [18]. In general, a microwave bandpass filter is considered a competitor if it meets the current trend's requirements which are compact size, high selectivity (high-quality factor), low insertion loss (close to 0 dB), low reflection coefficient (less than -10 dB), and affordable cost.…”