Multiband antenna assemblies including helical and linear radiating elements

A multiband antenna assembly comprising:

• at least one helical radiator having a longitudinal axis;
• and
• at least one linear radiator aligned with and/or disposed at least partially along the longitudinal axis of the at least one helical radiator;
• wherein:
• the at least one helical radiator includes an upper portion and a lower portion, the lower portion having wider pitch coils than the upper portion;
• and
• the at least one linear radiator includes a first conductor and a second conductor along an end portion thereof, the at least one linear radiator extending through one or more coils of the at least one helical radiator;
• whereby the antenna assembly is resonant in at least three frequency bands, including a very high frequency (VHF) band from 136 MHz to 174 MHz, an ultra high frequency (UHF) band from 380 MHz to 527 MHz, and a global positioning system (GPS) frequency band including a frequency of 1575 MHz.

A multiband antenna assembly comprising:

• at least one helical radiator having a longitudinal axis;
• and
• at least one linear radiator aligned with and/or disposed at least partially along the longitudinal axis of the at least one helical radiator;
• wherein:
• the at least one helical radiator includes a top helical radiator and a bottom helical radiator spaced apart from the top helical radiator;
• and
• the at least one linear radiator is between the top and bottom helical radiators, the linear radiator including a first conductor and a second conductor along an end portion thereof, the linear radiator extending through one or more coils of at least one of the bottom and top helical radiators;
• whereby the antenna assembly is resonant in at least three frequency bands, including an ultra high frequency (UHF) band from 380 MHz to 527 MHz, a 7-800 MHz frequency band from 764 MHz to 870 MHz, and a global positioning system (GPS) frequency band including a frequency of 1575 MHz.

A multiband antenna assembly comprising:

• at least one helical radiator having a longitudinal axis;
• and
• at least one linear radiator aligned with and/or disposed at least partially along the longitudinal axis of the at least one helical radiator;
• a circuit board;
• a matching network on the circuit board;
• wherein the antenna assembly terminates with a connector for connecting the antenna assembly to a device such that the antenna assembly depends to a ground plane of the device to excite;
• and
• wherein the matching network on the circuit board is between the connector and the helical and linear radiators;
• whereby the antenna assembly is resonant in at least three frequency bands;