International Journal of Antennas and Propagation / 2018 / Article / Tab 1

Research Article

Codesigned Wideband High-Efficiency Filtering SIW Slot Antenna with High Selectivity and Flat Gain Response

Table 1

Comparisons with previous reported works.

RefNumber of PoleNumber of NullBW (%)Selectivity (dB/GHz)Eff. (%)Size ()Layer

[8]406113/74891.3 × 1.71
[9]20363/2858.90.9 × 0.92
[10]321.696/55860.7 × 0.93
[11]305.526/57N.A.1.4 × 1.62
Ours329.1270/330931.1 × 1.21

is the guide wavelength at the centre frequency of the work band. Selectivity is calculated as , where is the attenuation of the first out-of-band radiation null or 20 dB attenuation if no radiation null and is the 3 dB attenuation; and are their corresponding frequency.