Antenna Gain-Bandwidth Enhancements Using CRLH Hilbert Fractal-based Structure

Abstract

 This paper introduces the design of lowprofile metamaterial-based arrays.  The array unit cell comprises a CRLH unit cell. A third-order Hilbert curve structure replaces the VIA, and aperiodic slots are introduced between the unit cells to enhance the overall performance.  A dual-bandwidth was achieved extended from (3.72 to 3.79) GHz and (6.99 to 8.55) GHz with maximum antenna gain equal to (5.28, 7.66) dBi, respectively.With the development of communication systems, antennas of small size and high gain have become essential to keep up with the new challenges. The metamaterials made these challenges possible. In this paper, a new low-profile metamaterialsbased array is designed. The array unit cell comprises a symmetric composite right left hand (CRLH) unit cell. A third-order Hilbert curve structure replaces the VIA, and aperiodic slots are introduced between the unit cells to enhance the overall performance. This design provides a significant improvement over the original design. CST M WS was used to stimulate the design. Gain and S11 are calculated to evaluate the antenna performance; a dual-bandwidth was achieved extended from (3.72 to 3.79) GHz and (6.99 to 8.55) GHz with maximum antenna gain equal to (5.28, 7.66) dBi, respectively. The antenna is characterized by its small size and high efficiency, making it suitable for Long-Term Evolution LTE, 5G, and satellite applications.

All‐Dielectric Integrated Meta‐Antenna Operating in 6G Terahertz Communication Window

“…A higher communication rate is also workable for this system instead of a terahertz source with a higher modulation rate. Other coding methods can be further developed for meta-antenna-enabled wireless sensing and communication systems in realistic scenarios of ISAC and improve the communication rate, for example, amplitudeshift keying (ASK), [58] orthogonal frequency division multiplexing (OFDM), [59] and quadrature amplitude modulation (QAM).…”

Low profile high gain RHCP antenna for L-Band and S-Band using rectangular ring metasurface with backlobe suppression

“…Metametrial (LH-MTMs) or Double negative (DNG) materials as well as Electronic bandgap structure (EBG) also enhance gain and directivity when primary source antenna is paired with them [30][31][32]. In [27] double closed ring resonator (DCR) as reflective metasurface unit cell was investigated.…”

“…By appropriately designing the scaterrers and controlling the phase and amplitude of wave it’s possible to enhance the amplitude of the waves in the desired direction, effectively increasing the gain of the antenna in that direction. Left- handed Metametrial (LH-MTMs) or Double negative (DNG) materials as well as Electronic bandgap structure (EBG) also enhance gain and directivity when primary source antenna is paired with them [ 30 – 32 ]. In [ 27 ] double closed ring resonator (DCR) as reflective metasurface unit cell was investigated.…”

Flexible Antenna Design for Wearable Telemedicine Applications

“…Due to their capability to wirelessly monitor and transmit data, wearable telemedicine devices in particular have grown in popularity. This has made it possible to remotely monitor patients' health conditions [3]. Small, adaptable, and effective antennas that can function at the 2.4 GHz ISM band are needed for the creation of wearable telemedicine devices [4].…”