Planar antennas for compact multiband transceivers using a microstrip feedline and multiple open‐ended ground slots

Abstract

Two planar antennas for compact multiband transceivers are presented, that employ an open-ended microstrip feedline that couples to multiple open-ended ground slots. The effect of separately introducing each of the slots on the antenna performance is outlined, and it is shown that the resonant frequencies of the antennas can be independently controlled by adjusting the dimensions of the ground slots. Antenna 1, consisting of an open-ended microstrip feedline that couples to three open-ended ground slots, exhibits a measured |S 11 | < −6 dB in the frequency ranges of 1.64-3.50 GHz, and 5.22-6.81 GHz, covering the standards of DCS, PCS, UMTS, Wibro, Bluetooth, WiMAX, HiperLAN 2 and WLAN with a measured gain that varies between 1.85 and 3.98 dBi, and with radiation efficiencies in excess of 80%. Antenna 2, consisting of an openended microstrip feedline that couples to four open-ended ground slots, exhibits a measured |S 11 | < −6 dB in the entire frequency range of 2.74-6.71 GHz, covering the standards of WiMAX, HiperLAN 2 and WLAN with a measured gain that varies between 4.98 and 5.28 dBi, and with radiation efficiencies in excess of 80%. Both antennas occupy a total size of only 40 × 30 × 1.6 mm 3 .

Design of a symmetric open slot antenna for UWB applications

“…From the distributions, it is observed that the resonance is generated by the high-order mode and radiates from the open slot too. Although not shown here for brevity, the U-shaped feeding line is also responsible for some radiation, especially at high frequencies, which is demonstrated in [36].…”

Expedited Feature-Based Quasi-Global Optimization of Multi-Band Antenna Input Characteristics With Jacobian Variability Tracking

“…Rapid development of cutting-edge technologies (e.g., 5G [1], internet of things [2], or wearable devices [3], including those for tele-medicine purposes [4]), leads to increasingly exacting requirements imposed on contemporary antenna structures. Among these, demands for miniaturization [5], multi-functionality [6], or multi-band operation [7] can be listed. In consequence, the complexity of the antenna geometries grows steadily, along with the number of design variables required for their parameterization.…”

Planar triple‐band balance‐shaped slot antenna

“…Many types of antennas appropriate for multiband WLAN/WiMAX applications have been reported recently . To sum it up, the main design approaches fall into three categories.…”

“…The first method is most convenient, which usually makes modifications on the radiating patch or the ground plane of the antenna. In , a planar antenna for compact multiband transceivers covering the standards of WiMAX, HiperLAN, and WLAN is presented. The resonant frequencies can be independently adjusted by the open‐ended ground slots.…”

“…The design evolution of the proposed antenna is investigated in detail and simulations are conducted to understand the working mechanisms. Compared to those designs using the same method shown in , it can not only completely cover the 2.4/5.2/5.8‐GHz WLAN (2.4–2.484, 5.15–5.35, and 5.725–5.825 GHz) and 2.5/3.5/5.5‐GHz WiMAX (2.50–2.69, 3.30–3.80, and 5.25–5.85 GHz) bandwidths, but also exhibit an attractive merit of simple structure and compact size. Details of the antenna design and experimental results are discussed below.…”