Dual-band glass-mounted antenna

A through dielectric coupler adapted for use in conjunction with a dielectric material having a first surface and a second surface, the coupler comprising:

• a first coupler assembly adapted for non-penetrating application to the first surface;
• a second coupler assembly adapted for non-penetrating application to the second surface;
• said first and second coupler assemblies each having a connection port for receiving a transmission medium whereby electromagnetic signals of two distinct frequency bands greater than 800 MHz and separated by a ratio of approximately 2:1 may be carried to and transmitted from each coupler assembly;
• each coupler assembly further comprising a coupling plate for coupling the electromagnetic signals through the dielectric material when said first and second coupler assemblies are mounted opposite one another across the dielectric;
• the first coupler assembly including a matching circuit for matching the characteristic impedance of the transmission medium connected to the connection port associated with the first coupler assembly to the load impedance presented by the second coupler assembly at each of the distinct frequency bands;
• and
• a conductive window frame associated with said second coupler assembly electrically isolated from the coupling plate of said second coupler assembly and positioned as a counterpoise and a capacitively-coupled extension of the first coupler assembly between coupling plates of each of the first and second coupler assemblies when the coupler assemblies are mounted on the dielectric material for coupling the two distinct frequency bands.

A dual-band on-glass antenna assembly comprising a first coupler assembly adapted to be mounted on a first surface of a glass substrate, the first coupler assembly comprising a conductive shell having a coaxial cable connector mounted thereon, a three-dimensional slotted microstrip transmission line matching circuit mounted within the conductive shell, a first coupler plate integrally formed with the matching circuit, a dielectric cover enclosing the shell, and a foam adhesive tape affixed to the cover for mounting the first coupler assembly to the glass substrate;

• a second coupler assembly adapted to be mounted on a separate surface of the glass substrate, the second coupler assembly comprising a base, a second coupling plate disposed on a bottom surface of the base, a two-sided adhesive laminate including a conductive window frame adhered to the base for mounting the second coupler to the second surface of the glass substrate in a position opposite the first coupler assembly, the conductive window frame being disposed between the first and second coupling plates, and an adjustable mount for pivotally supporting an antenna radiating element and electrically connecting the second coupling plate to the radiating element;
• and
• a dual-band radiating element comprising a base for attaching the radiating element to the adjustable mount, a phasing coil, a first radiating member, a capacitive choke assembly, and a second radiating member.