Dual‐band resonance antennas using epsilon negative transmission line

Abstract

Two types of dual-band resonance antennas based on the epsilon negative (ENG) transmission line are presented in this study. The first antenna has two unit cells with mushroom-like structure in which two notches are cut from their edges. This antenna has two different radiation patterns at its operating frequencies and hence it is a dual-mode antenna. In the second antenna, the structure of unit cells is modified in order to have the same radiation patterns at two operating frequencies. This antenna has two orthogonal polarisations at its operating frequencies and hence it is a dual-polarised antenna. The operating frequencies of the presented antennas correspond to the zeroth-and first-order resonance frequencies of the ENG resonator. Two prototypes of the proposed antennas have been fabricated and tested. The measured return loss and radiation patterns are given and discussed.

Miniaturized dual-band metamaterial inspired antenna with modified SRR loading

“…In order to compare the resonant frequency with physical size, electrical size of the proposed antenna have been compared and found smaller with the other antennas. Although, It is evident that at high level of miniaturization electric and magnetic fields are tightly bounded on the surface of the structure, 18 this antenna exhibits reasonable amount of gain which is comparable and good with respect to the antenna presented in [18][19][20] ; however 21,22 gives larger gain due to its large aperture size. In addition proposed antenna does not require any via process and thus it is easy to fabricate.…”

An Octave Bandwidth Metamaterials-based Hexagonal Patch Antenna

“…The electrical length L3/2 of the RH TL is /4 rad at 22.5 GHz. Using [12], the calculated RH-TL distributed series capacitance and inductance of the unit-cell hexagonal patch are 95 pF/m and 238 nH/m, respectively. The shunt inductance L is 0.78 nH.…”

Dual‐band metasurface‐based CP low‐profile patch antenna with parasitic elements

“…For example, the complementary split ring resonator has been widely used in patch antennas for dual-band applications [16][17][18][19][20]. Epsilon negative transmission lines [21,22], CRLH TLs [23][24][25][26][27][28][29], and left-handed (LH) structures [30] were loaded in conventional antennas for dual-band/multi-band operation. These approaches achieve dual/multiple operating bands with dual/multiple modes effectively, but have a drawback, the narrow bandwidth.…”