Dual-Band Complementary Split-Ring Resonator Engraved Rectangular Monopole for GSM and Wlan/Wimax/5g Sub-6 GHZ Band (New Radio Band)

Abstract

In this paper, a rectangular monopole antenna engraved with a complementary split-ring resonator is proposed for dual-band operation. The proposed antenna is fabricated on an FR4 substrate with a dimension of 20 × 34 × 1.6 mm 3 . The entire simulation is done using CST EM studio software. The proposed antenna exhibits dual-band operation from 1.78 GHz to 1.90 GHz and from 3.45 GHz to 6.58 GHz. The band from 1.78 GHz to 1.90 GHz is due to the inclusion of CSRR, and its corresponding bandwidth is 120 MHz. It is validated with the quasi-static analysis. The permittivity characteristics of the proposed CSRR are retrieved using the NRW method and presented. The resonant frequency of the band created by the CSRR is 1.83 GHz with −37.68 dB as its return loss values. The second wider band is due to the combination of the mode created by the CSRR along with the radiating patch from 3.45 GHz to 6.58 GHz with 3132 MHz which has dual resonances at 3.65 GHz and 5.59 GHz with return losses of −30.23 dB and −29.80 dB. The optimal values are chosen with the help of parametric analysis. The designed antenna is fabricated and measured. The measured results of return loss, gain, E-plane, and H-plane are compared with simulated ones, and they comply with each other. The dual-band operation, compact size, stable radiation pattern along with gain above 2.3 dBi in the whole resonating band make it suitable for the GSM and WLAN/WiMAX/5G Sub-6 GHz band (new radio band).

Dual Band Split Ring Monopole Antenna Structures for 5g and Wlan Applications

“…The proposed antennas (PA1 and PA2) are compared with state of art multiband antennas using slots or rings with respect to size and the techniques used in Table 2. The substrate dimensions of the proposed antenna structures are smaller than all the reported antennas except [15,21]. The antenna in [15] is designed on multiple substrates (FR4 and glass) and therefore, difficult to fabricate as compared to the proposed antennas.…”

“…It is common in all antennas but shown in equivalent circuit model of Antenna 1 only. The rectangular monopole antenna or 'Antenna 1' can be represented by a parallel combination of R1, L1 and C1 [21]. A slot is etched in RMPA to form RRMPA or 'Antenna 2'.…”

“…The antenna in [15] is designed on multiple substrates (FR4 and glass) and therefore, difficult to fabricate as compared to the proposed antennas. The antenna in [21] is designed by engraving an SRR in a rectangular patch to operate over dual bands. However, it suffers from wide bandwidth in upper band due to coupling of modes generated by the patch and split ring.…”

“…Multiband antennas using annular ring and meta-material inspired split-ring resonator (SRR) are designed in [14][15][16][17][18][19][20][21][22]. An elliptical-ring with a split-triangular patch [14] and two connected rings [15] are used in designing a flexible dual-band and a transparent tri-band antenna, respectively.…”

“…Dual-band antennas using metamaterial inspired dual rectangular split ring [19] and electric inductive capacitive coupled hexagonal ring [20] have been designed. Complementary SRR (CSRR) [21] and Non-Bianisotropic CSRR [22] are engraved in rectangular patch to achieve dual and tri-band characteristics. Slots, annular ring, SRR, and CSRR are employed to miniaturize the dimensions of antenna.…”