Dual band antenna

A dual band antenna comprising a radiating element including:

• a one-quarter PCS wavelength radiating portion which serves as a base;
• a one-half PCS wavelength radiating portion;
• a PCS phasing coil joining said one-quarter PCS wavelength radiating portion to said one-half PCS wavelength radiating portion, wherein said PCS phasing coil substantially allows energy in the AMPS band to pass therethrough;
• a one-half AMPS wavelength radiating portion;
• and
• an AMPS phasing coil joining said one-half AMPS wavelength radiating portion to said one-half PCS wavelength radiating portion, wherein said AMPS phasing coil substantially prevents energy in the PCS band from passing therethrough, and wherein said AMPS phasing coil provides a 180 degree phase shift for energy in the AMPS band;
• whereby said one-quarter PCS and said one-half PCS wavelength radiating portions together behave as a one-quarter wavelength radiating sub-element for energy in the AMPS band, whereby said radiating element behaves as a one-half wavelength over one-quarter wavelength radiating element in the AMPS band;
• and
• whereby said one-half AMPS wavelength radiating portion is substantially inactive in the PCS band, such that said one-half PCS and said one-quarter PCS wavelength radiating portions behave as a one-half wavelength over one-quarter wavelength radiating element in the PCS band.

A tuning network for use with a glass pane, said tuning network comprising:

• a dual band radiator capable of radiating energy in the PCS and AMPS bands simultaneously;
• an outer inductor in shunt with said dual band radiator;
• a coaxial input cable having an outer jacket and an inner wire;
• an inner inductor in shunt with said coaxial input cable;
• an inner capacitor in shunt with said coaxial input cable and said inner inductor;
• and
• an on glass coupler including an outer coupler and an inner coupler, said inner and outer couplers being mounted on opposite sides of the glass pane, said outer coupler being connected in parallel with said dual band radiator and said outer inductor, said inner coupler being connected in parallel with said coaxial input cable, said inner inductor, and said inner capacitor, wherein the glass forms a series capacitor between said inner and outer couplers.

A dual band on glass antenna for use on a glass pane having an inner surface and an outer surface, said antenna comprising:

• an on glass coupler means for attaching said antenna to the glass pane and for transferring energy through the glass pane, said on glass coupler means including an inner coupler mounted on the inner surface of the glass pane and an outer coupler mounted on the outer surface of the glass pane;
• a radiating element including:
• a one-quarter first wavelength radiating portion attached to said outer coupler for radiating energy in the first band;
• a one-half first wavelength radiating portion for radiating energy in the first band;
• a first phasing coil joining said one-quarter first wavelength radiating portion to said one-half first wavelength radiating portion, wherein said first phasing coil substantially allows energy in the second band to pass therethrough;
• a one-half second wavelength radiating portion for radiating energy in the second band;
• and
• a second phasing coil joining said one-half second wavelength radiating portion to said one-half first wavelength radiating portion, wherein said second phasing coil substantially prevents energy in the first band from passing therethrough;
• whereby said one-quarter first and said one-half first wavelength radiating portions together behave as a one-quarter wavelength radiating sub-element for energy in the second band, whereby said radiating element behaves as a one-half wavelength over one-quarter wavelength radiating element in the second band;
• and
• whereby said one-half second wavelength radiating portion is substantially inactive in the first band, such that said one-half first and said one-quarter first wavelength radiating portions behave as a one-half wavelength over one-quarter wavelength radiating element in the first band;
• and
• connection means disposed on the inner side of the glass pane for delivering energy to said onglass coupler means.