FSS-based triplate antenna design concept for wireless devices

Conventional multiband antennas suffer from strong interactions among different operating frequencies, complex configurations, low bandwidth, and reduced efficiencies. A design concept for a multibeam multiband antenna in wireless devices is proposed in this paper. The design concept provides a promising approach to augment transmission and reception. The principle of design involves a primary radiating element embedded in a triplate conformation which excites a passive array of multiple frequency secondary radiators, forming a frequency selective structure in triplate (FSST). The higher order mode behavior of the parent antenna characterizes the design of FSST placed in its nearfield. The mathematical modeling and analysis of the design methodology is also presented. As proof of concept, the proposed design methodology is validated with simulations and experiments at four unlicensed communication bands and the results are compared.

Compact dual and triple band antennas for 5G-IOT applications

Designing miniaturized multiband antennas to cover both the 5G new radio frequencies (FR1 and FR2) simultaneously is a challenge for wireless communication researchers. This paper presents two antenna designs : a dual-band printed antenna of size 18 × 16 × 0.285 mm3 operating at FR1–5.8 GHz and FR2–28 GHz and a triple-band printed antenna with dimensions 30 × 25 × 0.543 mm3 operating at FR1–3.5 GHz and 5.8 GHz (sub-6 GHz microwave frequency bands) and FR2–28 GHz (mm-wave frequency band). The final projected triple-band antenna has a compact size with an impedance bandwidth of 12.71%, 11.32%, and 18.3% at 3.5 GHz, 5.8 GHz, and 28 GHz, respectively with the corresponding gain of 1.86 dB, 2.55 dB, and 4.41 dB. The measured radiation characteristics of the fabricated prototypes show that the proposed designs are suitable for trendy 5G-RFID and mobile Internet of things (IoT) applications.

PERFORMANCE IMPROVED TRIANGULAR MULTI BAND ANTENNA USING REACTIVE IMPEDANCE SUBSTRATE AND FREQUENCY SELECTIVE SURFACE

In modern world, communication devices need to be operated for more than one frequency bands. Lot of research works were carried out in the field of multiband antennas. The one major concern in the design of multiband patch antenna are the gain and bandwidth. Both gain and bandwidth of the multi band antenna can be improved for the better performance. In this paper a triangular multiband antenna is designed and the gain of the antenna is enhanced by the blend of reactive impedance surface and Frequency selective surface. The proposed antenna resonates 3.4 GHz, 4.2 GHz, 6.75 GHz,7.1 GHz, 7.5 GHz and 9.3 GHz with a better return loss and gain.

A Comprehensive Review on Multiband Reconfigurable Antenna

The advancement of wireless communication is markedly accountable from the past two decades. A variety of designs and techniques have been established in the domain of reconfigurable multiband antennas for different wireless services. Now a days, a high quality of communication with reduced size is required for new generation wireless system. A multiband reconfigurable functionality offers a flexible and high-performance design by single antenna only. A brief review on multiband antenna with different reconfigurable techniques is presented in this paper. Moreover, the new possibilities for future wireless communication system have been demonstrated. A reconfigurable system along with minimal interference level over the fixed or non-reconfigurable transceivers has been discussed in detail.

FRACTAL ANTENNA – WIRELESS COMMUNICATION NEW BEGINNING BREAKTHROUGH IN DIGITAL ERA

In this digital era, we are subject to cellular gadgets, there has been an expanding demand in antennas that are smaller, conformal, and broadband. Fractal antenna wire utilizes a self-comparative structure to expand the length of a material in an all-out surface zone. Fractal Antenna Systems creates and constructs the smaller, most astounding execution Wideband/multiband antennas on the planet. These antennas are regularly two to multiple times smaller than conventional aerials, while accomplishing remarkable recurrence inclusion and magnificent gains and power designs. Fractal Antenna’s items have been demonstrated in the toughest business, military, and government applications. Fractal antennas apparatuses depend on mind boggling rehashing geometrical shape shaving novel traits that make them particularly significant for broadcast communications and different remote needs. Their requirements are not well met by Traditional antennas apparatuses. Applications for fractal geometries in cell gadgets have turned out to be hotly debated issues of research in science and building due to buyer request.

Design and Research of Miniaturized Micro Strip Slot with and without Defected Ground Structure

In this paper, a compact microstrip patch has a slot associated with the Defected Ground Structure radiator is presented. Instead of semi-infinite ground plane, the proposed antenna adopts the defected ground plane. The Radiating patch mendacity on the FR-4 substrate which is having dielectric constant of 4.4, thereby provides good bandwidth. This microstrip antenna is designed for wide bandwidth applications in range of 5.5GHz to 7.25GHz. Proposed work introduces a methodology wherein reducing of structure’s increase the bandwidth as well as return loss with defected ground structure (DGS).However since communication systems require small size, broad band and multiband antennas, monopoles have to be ensued for fabricating broad-band and wide-band antennas. In the proposed work investigations are carried out to design a new antenna with broad-band properties. Simulations are carried out via An soft HFSS electromagnetic simulator software- fabricated on FR-4 Substrate and tested with Vector network Analyzer. Measurement and Simulation results obtained prove the applicability of proposed antenna in 5.5GHz to 7.25GHz frequency range with a return loss of -31.3dB and 11.5dB etc. Microstrip feed line technique is used to feed the antenna with 50Ω impedance.