Coupling degree adjustment circuit, an antenna apparatus and communication terminal apparatus

The first surface of the dielectric body (10) has a rectangular parallelepiped shape is formed first radiating element (11), and is formed with a second radiating element (12) of the dielectric body (10) of the second surface. First radiating element (11) and the second radiating element (12) extending from the respective first end to the second end (open end) of the L-shaped linear conductors. First radiating element (11) and the second radiating element (12) in a direction from a respective first end to the second end (end of the evolution) arranged side by side. First radiating element (11) in a first end of the coupling adjusting circuit (21) the first port (P1) is connected to a first end of the coupling of the second radiating element (12) of the regulating circuit (21) of port 2 (P2) is connected. First radiating element (11) and the second radiating element (12) mainly by the degree of coupling adjusting circuit (21) coupled.