Vehicle rear window glass antenna for transmission and reception of ultrashort waves

An antenna attached to a vehicle rear window glass for receiving and transmitting ultrashort waves the window glass being provided with a set of defogging heater strips each of which extends horizontally so as to leave a space between the lowermost heater strip and the lower edge of the window glass, the antenna being arranged in said space and comprising:

• a primary antenna section which is a combination of a plurality of elongated elements connected to each other so as to form a closed plane figure having at least one and not more than four vertexes each of which is acutely angled and pointed upward and defines an upper end of the primary antenna section, and a plurality of elongated elements comprising a single horizontally elongated element which defines a bottom side of said closed plane figure;
• a secondary antenna section comprising a single horizontally elongated element which extends below said primary antenna section and has a horizontal length in the range from 30 to 400 mm;
• and
• a feeder which is a coaxial cable having an inner conductor and an outer conductor with insulation therebetween, said primary antenna section being connected with said inner conductor and said secondary antenna section being connected with said outer conductor;
• wherein said primary antenna section has a shape of a character M, said horizontally elongated element of the primary antenna section extending from the bottom end of one leg of the character M to the bottom end of the other leg of the character M.

An antenna attached to a vehicle rear window glass for receiving and transmitting ultrashort waves, the window glass being provided with a set of defogging heater strips each of which extends horizontally so as to leave a space between the lowermost heater strip and the lower edge of the window glass, the antenna being arranged in said space and comprising:

• a primary antenna section which is a combination of a plurality of elongated elements connected to each other so as to form a closed plane figure having at least one and not more than four vertexes each of which is acutely angled and pointed upward and defines an upper end of the primary antenna section, and a plurality of elongated elements comprising a single horizontally elongated element which defines a bottom side of said closed plane figure;
• a secondary antenna section comprising a single horizontally elongated element which extends below said primary antenna section and has a horizontal length in the range from 30 to 400 mm;
• and
• a feeder which is a coaxial cable having an inner conductor and an outer conductor with insulation therebetween, said primary antenna section being connected with said inner conductor and said secondary antenna section being connected with said outer conductor;
• wherein said primary antenna section defines the perimeters of two adjacently arranged pentagons each of which consists of a rectangular lower part and a triangular upper part, said horizontally elongated element of the primary antenna section defining bottom sides of both of the two pentagons.