Data processing terminal, terminal designing apparatus and method, computer program, and information storing medium

A data processing terminal for performing data processing near a radio communication circuit for making radio communications at a predetermined communication wavelength λ, said data processing terminal comprising:

• a first ground plane comprised of a conductor which determines a potential reference;
• a second ground plane comprised of a conductor in a predetermined shape having a plurality of edges and a plurality of corners, said second ground plane positioned substantially in parallel with said first ground plane;
• a data processing circuit connected to at least one of said first ground plane and said second ground plane;
• and
• a connector positioned halfway between two of said edges opposing substantially in parallel with each other and arranged substantially in parallel with said edges for connecting said second ground plane to said first ground plane,
• wherein the longest distance a from one end to the other end of said connector along continuous edges of said second ground plane satisfies “a<λ/2α” (where α is a coefficient equal to or larger than “1”).

A terminal designing apparatus for use in designing a data processing terminal comprising a first ground plane comprised of a conductor which determines a potential reference, a second ground plane comprised of a conductor in a predetermined shape having a plurality of edges and a plurality of corners, said second ground plane positioned substantially in parallel with said first ground plane, a data processing circuit connected to at least one of sad first ground plane and said second ground plane, and ground connecting means for connecting said second ground plane to said first ground plane, said data processing terminal performing data processing using said data processing circuit near a radio communication circuit for making radio communications at predetermined communication wavelength λ, said terminal designing apparatus comprising:

• wavelength input means for receiving said communication wavelength λ therethrough;
• wavelength storing means for storing said communication wavelength λ entered through said wavelength input means;
• coefficient input means for receiving a coefficient α equal to or larger than “1”;
• coefficient storing means for storing said coefficient α entered through said coefficient input means;
• length input means for receiving lengths of two of said edges of said second ground plane substantially orthogonal to each other;
• length storing means for storing said two lengths entered through said length input means;
• and
• pattern generating means for generating a layout pattern for a plurality of said ground connecting means based on data stored in a variety of said storing means such that the longest distance a between a plurality of said ground connecting means along continuous edges of said second ground plane satisfies “a<λ/2α”.

A terminal designing apparatus for use in designing a data processing terminal comprising a first ground plane comprised of a conductor which determines a potential reference, a second ground plane comprised of a conductor in a predetermined shape having a plurality of edges and a plurality of corners, said second ground plane positioned substantially in parallel with said first ground plane, a data processing circuit connected to at least one of sad first ground plane and said second ground plane, and ground connecting means for connecting said second ground plane to said first ground plane, said data processing terminal performing data processing using said data processing circuit near a radio communication circuit for making radio communications at predetermined communication wavelength λ, said terminal designing apparatus comprising:

• wavelength input means for receiving said communication wavelength λ therethrough;
• wavelength storing means for storing said communication wavelength λ entered through said wavelength input means;
• coefficient input means for receiving a coefficient α equal to or larger than “1”;
• coefficient storing means for storing said coefficient α entered through said coefficient input means;
• length input means for receiving lengths of two of said edges of said second ground plane substantially orthogonal to each other;
• length storing means for storing said two lengths entered through said length input means;
• pattern input means for receiving a layout pattern for a plurality of said ground connecting means;
• pattern storing means for storing said layout pattern entered through said pattern input means;
• and
• pattern confirming means for confirming based on data stored in a variety of said storing means that the longest distance a between a plurality of said ground connecting means along continuous edges of said second ground plane satisfies “a<λ/2α”.

A terminal designing method for a terminal designing apparatus for use in designing a data processing terminal comprising a first ground plane comprised of a conductor which determines a potential reference, a second ground plane comprised of a conductor in a predetermined shape having a plurality of edges and a plurality of corners, said second ground plane positioned substantially in parallel with said first ground plane, a data processing circuit connected to at least one of sad first ground plane and said second ground plane, and a plurality of ground connecting means for connecting said second ground plane to said first ground plane individually at a plurality of positions near said edges, said data processing terminal performing data processing using said data processing circuit near a radio communication circuit for making radio communications at predetermined communication wavelength λ, said terminal designing method comprising:

• receiving data entry of said communication wavelength λ;
• storing said entered communication wavelength λ;
• receiving data entry of a coefficient α equal to or larger than “1”;
• storing said entered coefficient α;
• receiving lengths of two of said edges of said second ground plane substantially orthogonal to each other;
• storing said two entered lengths;
• and
• generating a layout pattern for a plurality of said ground connecting means based on a variety of stored data such that the longest distance a between a plurality of said ground connecting means along continuous edges of said second ground plane satisfies “a<λ/2α”.

A terminal designing method for a terminal designing apparatus for use in designing a data processing terminal comprising a first ground plane comprised of a conductor which determines a potential reference, a second ground plane comprised of a conductor in a predetermined shape having a plurality of edges and a plurality of corners, said second ground plane positioned substantially in parallel with said first ground plane, a data processing circuit connected to at least one of sad first ground plane and said second ground plane, and a plurality of ground connecting means for connecting said second ground plane to said first ground plane individually at a plurality of positions near said edges, said data processing terminal performing data processing using said data processing circuit near a radio communication circuit for making radio communications at predetermined communication wavelength λ, said terminal designing method comprising:

• receiving data entry of said communication wavelength λ;
• storing said entered communication wavelength λ;
• receiving data entry of a coefficient α equal to or larger than “1”;
• storing said entered coefficient α;
• receiving lengths of two of said edges of said second ground plane substantially orthogonal to each other;
• storing said two entered lengths;
• receiving data entry of a layout pattern for a plurality of said ground connecting means;
• storing said entered layout pattern;
• and
• confirming based on a variety of stored data that the longest distance a between a plurality of said ground connecting means along continuous edges of said second ground plane satisfies “a<λ/2α”.