Compact high-directivity directional coupler structure using interdigitated coupled lines

An electronic device, comprising:

• an antenna;
• and
• a directional coupler electrically connected to the antenna, the directional coupler including:
• a first line;
• a second line including a first section disposed above the first line and a second section disposed beneath the first line, the second section being separate from the first section by a distance;
• and
• at least one bridge electrically connecting an end of the first section with an end of the second section by extending above or below the first line,
• wherein a width of the first line and a width of the first section and the second section of the second line are set to modify one of a plurality of coupled line parameters.

A device, comprising:

• a transmitter;
• an antenna;
• a first line;
• a second line including a first section disposed on a first side of the first line and a second section disposed on a second side of the first line, the second side being opposite to the first side and the second section being separate from the first section by a distance;
• and
• at least one bridge electrically connecting an end of the first section with an end of the second section,
• wherein the first line, the second line, and the at least one bridge are electrically connected to the transmitter on a first end and to the antenna by a via on a second end opposite to the first end, and
• wherein a width of the first line and a width of the first section and the second section of the second line are set to modify one of a plurality of coupled line parameters.