Resonator Based Switching Technique between Ultra Wide Band (UWB) and Single/Dual Continuously Tunable-Notch Behaviors in UWB Radar for Wireless Vital Signs Monitoring

Abstract

This paper presents a novel resonator that can switch and create three important behaviors within the same antenna using miniaturized capacitors. The resonator was integrated into conventional Ultra-Wide Band (UWB) antenna to achieve UWB and Single/Dual continuously tunable-notch behaviors. The Single/Dual notched was continuously tuned to our desired frequency band by changing the value of the capacitors. The antenna designed and fabricated to validate these behaviors had a compact size of 24 × 30.5 mm2, including the ground plane. The radiation patterns were very clean due to the placement of the proposed resonator in the special ground plane. Moreover, the presented novel resonator and switching technique was compared with the recently proposed resonators and their switching techniques. The prototype for the antenna was also developed in order to validate its performance in wireless vital signs monitoring. The presented miniaturized resonator based antenna was utilized for tumor sensing and simulations were provided in this regard. Moreover, the deployment of the proposed resonator based UWB antenna sensor in Pipeline Integrity Monitoring system was also investigated and discussed.

Compact UWB Band-Notched Antenna with Integrated Bluetooth for Personal Wireless Communication and UWB Applications

“…The resonator integrated to achieve Bluetooth within a single notched UWB antenna was also investigated and analyzed. The effective permittivity, ε e f f , and effective permeability, µ eff, for this resonator can be determined using the following relations [26,36]:…”

“…Section 4, which is followed by a conclusion, illustrates the originality of the proposed technique compared to other state-of-the-art designs. Figure 1a shows the conventional reference UWB antenna designed using [26]. It features a radiator combined with a rectangular and semi-circular patch with an edge-curved modified ground plane.…”

An Inner- and Outer-Fed Dual-Arm Archimedean Spiral Antenna for Generating Multiple Orbital Angular Momentum Modes

“…However, it is very costly to fabricate the proposed helical antennas due to their three-dimensional configuration. Recently, the Archimedean spiral and other structures have attracted a great deal of attention due to their broad bandwidth [21][22][23][24][25]. In addition, another broadband method for generating multiple OAM modes has been proposed in the radio frequency region based on the Archimedean spiral antenna [26], but it only radiates positive OAM modes that are determined by the direction of spiral winding.…”

Tilted-Beam Switched Array Antenna for UAV Mounted Radar Applications with 360° Coverage

“…Using drones for wireless communication and aerial base stations are other exemplary topics of research [6][7][8][9]. Although there has been a lot of previous research on the integration of wireless sensors, radars, or IoT devices with UAV, including drones, most of the work has focused on the connectivity of UAV using the currently existing antenna structures [10,11]. Since the uniqueness of UAV applications is emphasized by the physical location of communication devices, the conventional antenna structures or previously reported reconfigurable antenna structures [12][13][14][15][16][17][18][19][20][21][22] cannot be effectively used.…”