A Dual Circularly Polarized CPW-fed Square Slot Antenna for WLAN Applications

Wideband dual circularly polarized coplanar waveguide‐fed slot antenna with an arrow‐shaped strip

“…A comparison of different types of DCP antennas 10–18 is illustrated in Table 2. Compared with others, the dimension of this prototype is more compact with 0.615 λ c × 0.615 λ c × 0.0066 λ c ( λ c is the free space wavelength at the center frequency of IBW).…”

“…Referring to our previous work, 18 Ant. 1 is preliminarily designed, a DCP slot antenna loaded with impedance matching network.…”

“…More information about Ant.1 can be found in Ref. [18]. The dashed lines (M1, M4) represent the dominating magnetic current path in the slot modes ( Mode1 and Mode4 ) and the solid lines (M2, M3) represent the dominating current path in the monopole modes ( Mode2 and Mode3 ).…”

“…However, the 3 dB ARBW of these is relatively limited with only 3.5-4GHz (16%) and 4.9-5.95 GHz (19.4%). The DCP slot antennas [15][16][17][18] can be candidates thanks to its lower quality factor for the wideband property. Compared with microstrip-fed, 15 CPW-fed structure 16 is more attractive because of its lower radiation loss and less dispersion.…”

“…In our preceding design, 18 the rectangular strip and square slot have been adopted to design DCP antenna with IBW 65.1% (1.73–3.4 GHz) and ARBW 46.3% (1.94–3.11 GHz). However, the bandwidth was not satisfactory for wider‐band systems.…”