A　compact　filtering　antenna　with　wide-band　filtering　performance　is　proposed.　Triple-mode　resonator　and　L-shaped　monopole　antenna　are　integrated　to　be　an　antenna.　The　L-shaped　monopole　antenna　is　considered　as　a　radiating　impedance,　and　its　equivalent　circuit　is　the　last　resonator　of　a　bandpass　filter.　The　matching　between　the　resonator　and　the　antenna　can　be　achieved　by　adjusting　the　width　of　coupling　gap.　Finally,　a　filtering　antenna　operating　at　3.45　GHz　is　designed,　and　the　fractional　bandwidth　of　12.7%　is　achieved.　Experimental　results　show　that　it　has　a　good　frequency　selectivity　as　a　bandpass　filter,　and　good　radiation　pattern　as　an　antenna.　©　2018　IEEE.