Saw Filter Comprising a Broadband Band-Stop Filter

A wireless communication end device for mobile radio, comprising:

• a band-stop filter, comprising:
• a piezoelectric substrate,
• a plurality of surface wave element (SAW) impedance elements on the substrate,
• at least one series branch comprising at least one series resonator having a finger period, and
• a plurality of parallel branches connected electrically in parallel with the series branch, each parallel branch comprising at least one parallel impedance element comprising an interdigital transducer and having a finger period,
• wherein the average finger period of the at least one series resonator is greater than the average finger period of the at least one parallel impedance element,
• wherein the device is configured for receiving in a frequency band transmitting video and/or audio data, for blocking a mobile radio frequency band adjacent to the frequency band transmitting video and/or audio data.

An antenna, comprising:

• a band-stop filter, comprising:
• a piezoelectric substrate,
• a plurality of surface wave element (SAW) impedance elements on the substrate,
• at least one series branch comprising at least one series resonator having a finger period, and
• a plurality of parallel branches connected electrically in parallel with the series branch, each parallel branch comprising at least one parallel impedance element comprising an interdigital transducer and having a finger period,
• wherein the average finger period of the at least one series resonator is greater than the average finger period of the at least one parallel impedance element,
• wherein the antenna is configured for an audio and/or video receiver for blocking a mobile radio frequency band adjacent to the audio and video transmission band.