Circularly Polarized Dual Facet Spiral Fed Compact Triangular Dielectric Resonator Antenna for Sensing Applications

In this article, a probe fed V‐shaped dielectric resonator antenna (DRA) loaded with circular patches, is proposed for X band applications. A prototype was fabricated to validate the results. Circular polarization is achieved by the geometry of DRA integrated with the circular patches on its surface. These circular patches behave as a monopole antenna. To achieve circular polarization two orthogonal fields have been excited in the DRA, which are in time phase quadrature. Due to the symmetry of design, it shows dual polarization, both Left Hand Circular Polarization (LHCP) and Right Hand Circular Polarization (RHCP), in two orthogonal directions. The fabricated prototype exhibits wide impedance bandwidth of 7.85‐10.1 GHz (25%) and circular polarization (CP) Bandwidth (BW) of 8.35‐8.7 GHz (4%). Maximum measured gain of 4.8 dBi has been obtained in comparison with the simulated gain of 5.6 dBi. Applications of the proposed antenna include satellite communication, telemetry tracking and control, Synthetic aperture radar (SAR), weather radar, and military radar in X band. Directional CP performance is useful in designing a smart antenna and multiple input multiple output (MIMO) antenna.

Section: Characterization and Results Validationmentioning

confidence: 99%

Circularly polarized V‐shaped dielectric resonator antenna

Singhwal

Kanaujia

Singh³

et al. 2019

“…This section highlights the state‐of‐the‐art developments of CPDRA using single point feed 11‐64 and multi‐point feed power divider, 65‐76 along with modification of three dimensional DR shapes 77‐103 . In this review article, the authors have segregated CP mechanism in terms of excitation of feeding techniques like microstrip line, coaxial probe, and aperture coupled feed, which will be helpful to the researcher to get the complete idea about the developments of particular excitation feeding method …”

Section: Techniques To Generate Cpdramentioning

confidence: 99%

“…One of the fundamental subjects in the broad area of DRA is the excitation scheme, which deals with the problem of how to couple the electromagnetic energy from the feeding transmission line to the dielectric radiator efficiently. Feeding techniques can be divided into single point feed and multi‐point feed power divider, which plays an important role in generation of CP for the case of DRA over three and half decades 11 ‐76 …”

Section: Techniques To Generate Cpdramentioning

confidence: 99%

A chronological review of circularly polarized dielectric resonator antenna: Design and developments

Meher

Behera

Mishra

et al. 2021

This article presents a chronological overview of circularly polarized dielectric resonator antennas (CPDRAs). This article provides a comprehensive review about innovation and rapid developments of CPDRAs over the last three and half decades since 1986s. The objective of this article is to highlight the basic concept of CP mechanism in DRA and state‐of‐the‐art developments of CPDRAs in terms of single and multi‐point feed for unmodified and modified DR geometries considering different types of excitation mechanism such as microstrip line, coaxial probe, and aperture coupled feed. To give insights into circular polarization, Authors proposed a compact modified CPDRA. It offers simulated bandwidth of 47.5% (2.34‐3.80 GHz), measured impedance bandwidth of 50.8% (2.26‐3.78), and simulated axial bandwidth of 13% (3.29‐3.75 GHz) respectively. Other antenna parameters such as peak realized gain and radiation efficiency are 7.7 dBi and 98% within operating frequency bands, respectively. The proposed outcomes confirm that the proposed CPDRA can be used as a suitable candidate for wireless body area network applications.

“…CP antennas have been successfully employed to overcome the multipath effect and random polarization mismatching in wireless communications and wearable sensing systems . Although distributed CP diversity systems can be implemented by using a pair of CP antennas with opposite sensing, dual CP antennas would provide a co‐location diversity transmitting/receiving functionality, and thus reduce the size, complexity and cost of wireless sensor systems. In the past few years, a series of dual CP antennas have been developed.…”

Section: Introductionmentioning

confidence: 99%

Dual circularly polarized loop antenna using a pair of resonant even‐modes

Yuan

et al. 2019

Conceptual design of dual circularly polarized (CP) square loop antennas using a pair of resonant even-modes for wireless sensor application is presented. A pair of even-modes is simultaneously excited within a single, nonuniform square loop element and employed to realize a dual circular polarization characteristic. When the natural boundary conditions of the even-modes and the feed lines are matched, respectively, a bidirectional dual CP loop antenna can be attained at first. Then, a unidirectional dual CP loop antenna is designed by introducing a simple metallic reflector. Both bidirectional and unidirectional designs exhibit dual CP performance with available operation bandwidth of 10.0% and 8.5%. The design approach is expected to get applications in dual CP antenna designs for wireless sensor systems. K E Y W O R D S dual circularly polarized antennas, even-mode resonant, square loop antenna 1 | INTRODUCTIONWireless sensors have been widely applied in wearable human activity recognition, 1 embedded sensing network, 2,3 home automation, 4 and so forth. The reliability of wireless signal transmission/reception in multipath fading, wireless sensing environments is always a critical challenge. CP antennas have been successfully employed to overcome the multipath effect and random polarization mismatching in wireless communications 5 and wearable sensing systems. 6 Although distributed CP diversity systems can be implemented by using a pair of CP antennas with opposite sensing, 6 dual CP antennas 7,8 would provide a co-location diversity transmitting/receiving functionality, and thus reduce the size, complexity and cost of wireless sensor systems. In the past few years, a series of dual CP antennas have been developed. These designs can be classified into three distinctive types according to their operation principles. The first type is the symmetrical perturbation 9,10 technique with enhanced compensation network 11 : Several symmetrical parasitic elements are stacked to the primary patch radiator, thus both LHCP and RHCP can be excited simultaneously. The second one is to use an additional 90 branch-line directional coupler. By connecting two orthogonal linearly polarized (LP) elements to the outputs of such couplers, RHCP and LHCP can be attained at the two mutually isolated inputs. [12][13][14][15][16] The third one is to enhance coupling with phase shifting network, 17-21 which can be recognized as the improved version of the two previous techniques.Basically, these techniques share one common characteristic that dual CP characteristic should be implemented by simultaneously exciting two orthogonal LP components with equal-magnitude and in/out phase-quadrature. Owing to introducing the techniques of symmetrical perturbations, 90 branch-line directional coupler, and phase shift networks, the resultant antennas are inevitably with high structural complexities having quite numerous parameters. As promising dual CP antenna designs with relatively simple structures, loop antennas have drawn more and more attenti...