An octa-band planar monopole antenna for portable communication devices

Abstract

Due to the rapid development of wireless communication systems, good numbers of services and devices use different frequency bands and protocols. To concurrently cover all these services, the antenna in communication devices should operate over multiple frequency bands. The use of wide and multi-band antennas not only reduces the number of antennas necessary to cover multiple frequency bands but also lessens the system complexity, size, and costs. To operate over eight frequency bands to cover sixteen well-established narrow service bands, a planar monopole antenna is proposed for portable communication devices. The proposed antenna is comprised of an inverted F-shaped monopole patch with a rotated L-shaped strip and an F-shaped ground strip with a rotated L-shaped branch. The studied antenna can excite at multiple resonant modes which helps it to achieve eight measured operating bands of 789–921 MHz, 1367–1651 MHz, 1995–2360 MHz, 2968–3374 MHz, 3546–3707, 4091–4405 MHz, 4519–5062 MHz and 5355–6000 MHz. The achieved measured operating bands can cover sixteen popular narrow service bands for 4G/3G/2G, MWT, WiFi, WiMAX, WLAN, and sub-6 GHz 5G wireless communication system. The studied antenna achieved good gain, efficiency and exhibits stable radiation characteristics. Moreover, the antenna does not use any lumped element and left ample space for other circuitries which makes it easier to use in portable devices such as tablets, laptops, etc. with low manufacturing cost.

Monopole Directional Antenna Bioinspired in Elliptical Leaf with Golden Ratio for WLAN and 4G Applications

“…In this work is proposed the development of a directional monopole antenna, bioinspired in the elliptical leaf, generated by Gielis formula, with cut in the radiation element according the golden ratio, operating in the WLAN (2.4 GHz to 2.483 GHz) LTE 4G band at 2.5 GHz (2.5 GHz to 2.6 GHz). The methodology to the development of bioinspired antennas used in this work is adapted of [7], with a choice of the frequencies applications for WLAN and mobile communications in LTE 4G band, built in fibber glass (FR4) dielectric material, relative permittivity of εr = 4.4, loss tangent of tan(δ) = 0.02, using shape of elliptical leaf, generated by MATLAB®, simulated by Ansys software, and performed in the Laboratory of Measurements of the Federal Institute of Paraiba (IFPB), Campus of João Pessoa using a Vector Network Analyzer (VNA) of Agilent model S5071C (300 kHz-20 GHz).…”

“…A planar monopole antenna is also known as a monopole antenna, as characterized by presented wideband an ultra-wideband, compact structure, low gain, operating in several frequency bands, numerous shapes, and omnidirectional radiation pattern [7][8]. Some techniques were used to change monopole antenna parameters, such as modifications in the ground plane [9], the use of the metamaterials [10], and the insertion of the reflector in the antenna back [4].…”

“…The plant has a complex light-harvesting system, and a reaction centre [14][15], acting as a receiving antenna. Thus, the shapes of plants are optimized for the light-harvesting, an electromagnetic waves, in the THz range, their shapes have a compact structure with a greater perimeter, an important feature in antenna technology since the resonance frequency of an antenna is related to the perimeter of the radiating element in a patch antenna [4][5][6][7].…”

Monopole directional antenna bioinspired in elliptical leaf with golden ratio for WLAN and 4G applications

“…A planar monopole antenna is also known as a monopole antenna, as characterized by presented wideband an ultra-wideband, compact structure, low gain, operating in several frequency bands, numerous shapes, and omnidirectional radiation pattern 7 , 8 . Some techniques were used to change monopole antenna parameters, such as modifications in the ground plane 9 , the use of the metamaterials 10 , and the insertion of the reflector in the antenna back 4 .…”

“…The plant has a complex light-harvesting system, and a reaction centre 14 , 15 , acting as a receiving antenna. Thus, the shapes of plants are optimized for the light-harvesting, an electromagnetic wave, in the THz range, their shapes have a compact structure with a greater perimeter, an important feature in antenna technology since the resonance frequency of an antenna is related to the perimeter of the radiating element in a patch antenna 4 – 7 .…”