Antenna apparatus and communication system

An antenna apparatus, comprising:

• a first radiating element located on a first side of said antenna apparatus, said first radiating element having an earth position determining tab being an end of a feed terminal;
• a second radiating element located opposite said first radiating element;
• and
• a third radiating element on a second side of said antenna apparatus that is opposite to said first side of said apparatus, said second radiating element intervening between said first radiating element and said third radiating element,
• wherein said first radiating element and said third radiating element are equipped with a feed terminal common to both, and
• electric fields are generated at least between said first radiating element and said second radiating element, and between said second radiating element and said third radiating element, and electric wave transmission and reception is performed.

A communication system, comprising:

• an antenna apparatus including:
• a first radiating element located on a first side of said antenna apparatus said first radiating element having an earth position determining tab being an end of a feed terminal;
• a second radiating element located opposite said first radiating element;
• and
• an earth located at a second side of said antenna apparatus that is opposite to said first side of said apparatus, said second radiating element intervening between said first radiating element and earth, wherein said first radiating element or said second radiating element is equipped with a feed terminal, electric fields are generated at least between said first radiating element and said second radiating element, and between said second radiating element and said earth, and electric wave transmission and reception is performed;
• and
• a distributor for connecting said feed terminal to a communication apparatus for linear polarization and/or a communication apparatus for circular polarization.

A communication system, comprising:

• an antenna apparatus including:
• a first radiating element, said first radiating element having an earth position determining tab being an end of a feed terminal;
• a second radiating element located opposite said first radiating element;
• and
• a third radiating element that is located at a second side of said antenna apparatus that is opposite to said first side of said apparatus, said second radiating element intervening between said first radiating element and earth, wherein said first radiating element and said third radiating element are equipped with a feed terminal, electric fields are generated at least between said first radiating element and said second radiating element, and between said second radiating element and said third radiating element, and electric wave transmission and reception is performed;
• and
• a distributor for connecting said feed terminal to a communication apparatus for linear polarization and/or a communication apparatus for circular polarization.