Abstract A novel wideband high-selectivity substrate-integratedwaveguide (SIW) filtering antenna with controllable radiation nulls is proposed. This antenna is composed of a two-layered SIW resonator, two radiating slots on the top layer, and two coupling slots on the middle layer. A vertical SMA connector is located at the bottom and feeds two SIW cavities simultaneously. By adjusting the parameters of these slots, three radiation nulls will be achieved, and two radiation nulls can be easily controlled. For demonstration, one prototype of the filtering antenna is fabricated and measured. Measurement results show that the fractional bandwidth for |S11| < -10 dB is 8.9% (3.86-4.23 GHz), the gain is 6.08 dBi at center frequency 4.05 GHz, three radiation nulls are achieved at 3.7 GHz, 4.3 GHz, and 5.19 GHz, respectively. The out-of-band skirt selectivities of two sidebands are 150 and 332 dB/GHz, respectively. highselectivity high selectivity substrateintegratedwaveguide substrate integratedwaveguide (SIW proposed twolayered layered resonator layer simultaneously controlled demonstration measured S11 S |S11 10 -1 89 8 9 8.9 3.864.23 386423 3.86 4.23 3 86 4 23 (3.86-4.2 GHz , GHz) 608 6 08 6.0 405 05 4.0 37 7 3. 43 4. 519 5 19 5.1 respectively outofband out band 15 33 dBGHz dB/GHz S1 |S1 1 - 8. 864 3.864.2 38642 386 3.8 423 4.2 2 (3.86-4. 60 0 6. 40 51 5. |S 3.864. 3864 38 42 (3.86-4 3.864 (3.86- (3.86 (3.8 (3. (3 (

Abstract The biodegradation of synthetic dyes by fungi is emerging as an effective and promising approach. In the present study, freshwater fungal strains isolated from submerged woods were screened for the decolorization of 7 synthetic dyes. Subsequently, 13 isolates with high decolorization capability were assessed in a liquid system; they belonged to 9 different fungal species. Several strains exhibited a highly effective decolorization of multiple types of dyes. New absorbance peaks appeared after the treatment with 3 fungal strains, which suggests that a biotransformation process occurred through fungal biodegradation. These results showed the unexploited and valuable capability of freshwater fungi for the treatment of dye-containing effluents. The ability of certain fungi to decolorize dyes is reported here for the first time.