Wideband Shorted Patch Antenna Under Radiation of Dual-Resonant Modes

On the multi‐resonant antennas: Theory, history, and new development

“…As for a multi‐resonant microstrip patch antenna at its basic form, its bulky size larger than one wavelength limits its application for array designs. To further reduce the antenna size and enhance its radiation performance, more comprehensive technique incorporating shorting‐wall, slotted patch, and shorting‐pin loadings are further developed . At the cost of antenna height (moderate low profile up to 0.055‐guided‐wavelength), configuration complexities (V‐shape slot and double‐pin loadings) and narrower available bandwidth (less than 12%), the maximum antenna size can be effectively reduced to 0.55‐guided‐wavelength.…”

“…A single‐pin loading technique is introduced in a dual‐resonant circular sector patch antenna on very thin air substrate (ie, thickness of 2 mm, about 0.019‐wavelength at 2.8GHz). It is observed that a stable available bandwidth of 13% can be attained with significant reduction of antenna height, compared to its counterparts . Although the antenna in has a relatively large size with a radius of about 0.37‐wavelength, its radius can be easily reduced by using a larger flared angle or introducing loaded dielectric materials.…”

“…As presented in, a 4 × 1 linear array using single‐layered, dual‐resonant circular patch antenna on moderate air substrate (thickness = 0.05‐wavelength) can exhibit high gain up to 15.5/16.6 dBi (H‐/E‐plane array), sidelobe level of ‐15 dB and available bandwidth of 20%, which is superior to its counterpart based on slot elements . Therefore, it can be determined that the generalized multi‐resonant dipole theory should exhibit promising potential for compact wideband antenna designs with simple configurations, especially for low‐profile antennas, in future high‐performance antenna developments.…”

Ferrite‐based wideband circularly polarized microstrip antenna design

“…As described in the previous section, the antenna shown in Figure 1 had a wideband circular polarization; however, it also had a small impedance bandwidth. This can be addressed by employing impedance bandwidth enhancement techniques [26][27][28][29][30]. For example, the dual resonance method was used in references [27][28][29][30] to improve the impedance bandwidth of patch antennas.…”

Low‐profile wideband patch antenna using double‐tuned impedance matching

“…This method introduced another resonance to the antenna and a bandwidth as high as 30% can be obtained . In recent years, the microstrip antenna utilizing multi‐resonance is proposed . Using different modes, such as TM 10 and TM 30 modes, the bandwidth of the antenna can be enhanced significantly.…”