Miniaturised printed slot antenna with multi‐ring technique for dual‐band and broadband operations

Abstract

Miniaturised microstrip‐line‐fed slot antennas with ring‐shaped metallic strips for dual‐band and broadband operations are investigated and verified in this study. The proposed designs implemented on a 0.8‐mm FR‐4 substrate show that the ring‐shaped metallic strips and the feeding structure yield multiple resonant modes, achieving 66.3% size reduction. The proposed dual‐band design reveals two operating bandwidths (12.4 and 46.5%) at the central frequencies of 2445 and 4813 MHz, respectively. The broadband design indicates the maximum bandwidth of 2511 MHz (69.6%) at 3606 MHz. This large operating bandwidth is obtained by choosing suitable combinations of feeding structure and multi‐ring slot shapes. Simulated and experimental investigations are clearly conducted to understand their behaviours and optimise them for dual‐band and broadband operations.

Planar dual-mode wideband antenna using short-circuited-strips loaded slotline radiator: Operation principle, design, and validation

“…As observed from Figures , we can figure out that the operation bandwidth of the slotline antenna can be effectively enhanced without reshaping a thin slotline resonator into a wide aperture or complex geometry . Based on the above analysis, it is further found that the dual‐mode slotline radiator has a relatively high input impedance of 150–200 Ω, while its impedance bandwidth theoretically approaches 54.0% which is much larger than that of many conventional slot antennas.…”

“…Table shows another aspect of comparison in terms of the LWR between the proposed and other reported antennas in . It is seen that the proposed slotline antenna is much narrow in slot width as highly demanded in design of slot antennas and its LWR is enlarged as up to 42.00.…”

A dual-band slot antenna with two pairs of slot patches for cross-polarization reduction

“…Proceedings of ISAP 2014, Kaohsiung, Taiwan, Dec. [2][3][4][5]2014 resonant mode in the high-band, and makes the bandwidth improvement. A comprehensive analysis has been done to understand the effects of various dimensional parameters and to optimize the performances of the designed antennas [5].…”

“…A comprehensive analysis has been done to understand the effects of various dimensional parameters and to optimize the performances of the designed antennas [5]. By properly selecting and tuning their dimensions (x 1 -4 ) of tuning stub to be an asymmetric shape (x 3…”

Dual-Band (28,38) GHz Coupled Quarter-Mode Substrate-Integrated Waveguide Antenna Array for Next-Generation Wireless Systems

“…SIW slot arrays [10] achieve multi-band performance in a straightforward manner, but suffer from narrowband characteristics and bulky footprints, as every additional band requires a separate antenna element with a footprint in the order of half a wavelength. Ring slot [11]- [12] or resonant slot [13]- [14] antennas exhibit bandwidth-limited behavior and low antenna/platform isolation, making close integration with active electronics virtually impossible. Conversely, cavity-backed slot antennas [15]- [18] exhibit excellent electromagnetic shielding capabilities, but generally rely on resonant slots, limiting the bandwidth.…”