Antenna apparatus and method for adjusting characteristics thereof

A method for adjusting characteristics of an antenna apparatus, wherein the antenna apparatus comprises an antenna block and a substrate upon which the antenna block is mounted,

• the antenna block has a base that is made of a substantially cuboid dielectric body or magnetic body, an upper-surface conductor formed on an upper surface of the base, first and second pad electrodes that are formed on both ends of a bottom surface of the base in a longitudinal direction of the base, respectively, and a lateral-surface conductor connecting the upper-surface conductor and the second pad electrode, and
• the substrate has a region mounting the antenna block, a ground pattern provided around the mounting region, first and second lands that are provided within the mounting region so as to correspond to the positions of the first and second pad electrodes, a feed line that is connected to the first land, an impedance-adjusting pattern connecting the first land and the ground pattern, and a frequency-adjusting pattern connecting the second land and the ground pattern,
• the method comprising the steps of:
• preparing the substrate on which the impedance-adjusting pattern having a prescribed shape and size is formed and mounting the antenna block on the mounting region;
• measuring an impedance of the antenna block on the substrate;
• and
• selecting the impedance-adjusting element having an appropriate constant on the basis of the measurement results and mounting the impedance-adjusting element on a prescribed location on the substrate.

A method for adjusting characteristics of the antenna apparatus, wherein the antenna apparatus comprises an antenna block and a substrate upon which the antenna block is mounted,

• the antenna block has a base that is made of a substantially cuboid dielectric body or magnetic body, an upper-surface conductor formed on an upper surface of the base, first and second pad electrodes that are formed on both ends of a bottom surface of the base in a longitudinal direction of the base, respectively, and a lateral-surface conductor connecting the upper-surface conductor and the second pad electrode, and
• the substrate has a region mounting the antenna block, a ground pattern provided around the mounting region, first and second lands that are provided within the mounting region so as to correspond to the positions of the first and second pad electrodes, a feed line that is connected to the first land, an impedance-adjusting pattern connecting the first land and the ground pattern, and a frequency-adjusting pattern connecting the second land and the ground pattern,
• the method comprising the steps of:
• preparing the substrate on which the frequency-adjusting pattern having a prescribed shape and size is formed and mounting the antenna block on the mounting region;
• measuring a frequency of the antenna block on the substrate;
• and
• selecting the frequency-adjusting element having an appropriate constant on the basis of the measurement results and mounting the frequency-adjusting element on a prescribed location on the-substrate.