Window mounted vehicular radio antenna

Claim 2

In a vehicle, the combination comprising: an AM-FM radio receiver; a body portion having a window opening; a window mounted within the opening; a common terminal supported within the opening by the window; an FM conductor supported within the opening by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for developing a maximum current at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; an AM conductor supported within the opening by the window and connected at one end to the common terminal for providing an AM antenna, the AM conductor having an effective length approximately equal to one-half wavelength of the frequencies in the FM frequency band for developing a maximum impedance at the common terminal in response to the presence of FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor; and means for coupling the received AM and FM radio signals from the common terminal to the radio receiver.

Claim 3

An AM-FM antenna for a radio receiver carried by a vehicle including a conductive body portion having a window opening, comprising: a window generally conforming to the shape of the window opening for mounting within the opening; a common terminal supported by the window; an FM conductor supported by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for developing a maximum current at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; and an AM conductor supported by the window and connected at one end to the common terminal for providing an AM antenna, the AM conductor having an effective length approximately equal to one-half wavelength of the frequencies in the FM frequency band for developing a maximum impedance at the common terminal in response to the presence of FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor.

Claim 4

An AM-FM antenna for a radio receiver carried by a vehicle including a conductive body portion having a window opening, comprising: a window generally conforming to the shape of the window opening for mounting within the opening; a common terminal supported by the window; an FM conductor supported by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for developing a maximum current at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; and an AM conductor supported by the window and connected at one end to the common terminal for providing an AM antenna, the AM conductor having an effective length approximately equal to one-half wavelength of the frequencies in the FM frequency band for developing a maximum impedance at the common terminal in response to the presence of FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor.

Claim 5

In a vehicle, the combination comprising: an AM-FM radio receiver; a conductive body portion having a window opening coincident enclosed within a perimeter generally defined by mutually perpendicular major and minor axes; a window mounted within the opening; a common terminal supported within the opening by the window and located at approximately an intersection of the minor axis of the opening and the perimeter of the opening; an FM conductor supported within the opening by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor extending approximately coicident with the minor axis of the opening relatively remote from the perimeter of the opening to minimize the capacitance between the FM conductor and the body portion, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for maximizing the current developed at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; a pair of AM conductors supported within the opening by the window and each connected at one end to the common terminal for providing an AM antenna, the pair of AM conductors extending in symmetrical fashion with respect to the minor axis approximately parallel to the major axis of the opening adjacent the perimeter of the opening to minimize interference with vision through the window, the AM conductors each having an effective length approximately equal to one-half wavelength of the frequencies in the FM frequency band for maximizing the impedance at the common terminal in response to FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor; and means for coupling the received AM and FM radio signals from the common terminal to the radio receiver.

Claim 6

In a vehicle, the combination comprising: an AM-FM radio receiver; a conductive body portion having a window opening coincident enclosed within a perimeter generally defined by mutually perpendicular major and minor axes; a window mounted within the opening; a common terminal supported within the opening by the window and located at approximately an intersection of the minor axis of the opening and the perimeter of the opening; an FM conductor supported within the opening by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor extending approximately coicident with the minor axis of the opening relatively remote from the perimeter of the opening to minimize the capacitance between the FM conductor and the body portion, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for maximizing the current developed at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; a pair of AM conductors supported within the opening by the window and each connected at one end to the common terminal for providing an AM antenna, the pair of AM conductors extending in symmetrical fashion with respect to the minor axis approximately parallel to the major axis of the opening adjacent the perimeter of the opening to minimize interference with vision through the window, the AM conductors each having an effective length approximately equal to one-half wavelength of the frequencies in the FM frequency band for maximizing the impedance at the common terminal in response to FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor; and means for coupling the received AM and FM radio signals from the common terminal to the radio receiver.

Claim 7

An AM-FM antenna for a radio receiver carried by a vehicle including a conductive body portion having a window opening enclosed within a perimeter defined by an approximately horizontal major axis and an approximately vertical minor axis, comprising: a window generally conforming to the shape of the window opening for mounting within the opening; a common terminal supported by the window and located at approximately an intersection of the vertical axis of the opening and the periphery of the opening when the window is mounted within the opening; an FM conductor supported by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor extending approximately coincident with the vertical axis of the opening remote from the perimeter of the opening when the window is mounted within the opening thereby to minimize the capacitance between the FM conductor and the body portion, the FM conductor having an effective length approximately equal to one-quarter wavelength of the center frequency of the FM frequency band for maximizing the current developed at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; a plurality of pairs of AM conductors supported by the window and each connected at one end to the common terminal for providing an AM antenna, each pair of AM conductors extending in symmetrical fashion with respect to the vertical axis of the opening approximately parallel to the horizontal axis of the opening adjacent the perimeter of the opening when the window is mounted within the opening for minimizing interference with vision through the window, the AM conductors each having an effective length approximately equal to one-half wavelength of the center frequency of the FM frequency band for maximizing the impedance developed at the common terminal in response to FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM condcutor.

Claim 8

An AM-FM antenna for a radio receiver carried by a vehicle including a conductive body portion having a window opening enclosed within a perimeter defined by an approximately horizontal major axis and an approximately vertical minor axis, comprising: a window generally conforming to the shape of the window opening for mounting within the opening; a common terminal supported by the window and located at approximately an intersection of the vertical axis of the opening and the periphery of the opening when the window is mounted within the opening; an FM conductor supported by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor extending approximately coincident with the vertical axis of the opening remote from the perimeter of the opening when the window is mounted within the opening thereby to minimize the capacitance between the FM conductor and the body portion, the FM conductor having an effective length approximately equal to one-quarter wavelength of the center frequency of the FM frequency band for maximizing the current developed at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; a plurality of pairs of AM conductors supported by the window and each connected at one end to the common terminal for providing an AM antenna, each pair of AM conductors extending in symmetrical fashion with respect to the vertical axis of the opening approximately parallel to the horizontal axis of the opening adjacent the perimeter of the opening when the window is mounted within the opening for minimizing interference with vision through the window, the AM conductors each having an effective length approximately equal to one-half wavelength of the center frequency of the FM frequency band for maximizing the impedance developed at the common terminal in response to FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM condcutor.

Claim 9

In a vehicle, the combination comprising: an AM-FM radio receiver; a conductive body portion having a window opening enclosed within a perimeter generally defined by mutually perpendicular major and minor axes; a window mounted within the opening; a common terminal supported within the opening by the window and located at approximately an intersection of the minor axis of the opening and the perimeter of the opening; an FM conductor supported within the opening by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor extending approximately coincident with the minor axis of the opening relatively remote from the perimeter of the opening to minimize the capacitance between the FM conductor and the body portion, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for maximizing the current developed at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; an AM conductor supported within the opening by the window and including a pair of parallel spaced conductor sections connected in series relationship to the common terminal, the AM conductor sections extending approximately parallel to the major axis of the opening adjacent the perimeter of the opening to minimize interference with vision through the window, the AM conductor sections each having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for maximizing the impedance at the common terminal in response to FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor; and means for coupling the received AM and FM radio signals from the common terminal to the radio receiver.

Claim 10

In a vehicle, the combination comprising: an AM-FM radio receiver; a conductive body portion having a window opening enclosed within a perimeter generally defined by mutually perpendicular major and minor axes; a window mounted within the opening; a common terminal supported within the opening by the window and located at approximately an intersection of the minor axis of the opening and the perimeter of the opening; an FM conductor supported within the opening by the window and connected at one end to the common terminal for providing an FM antenna, the FM conductor extending approximately coincident with the minor axis of the opening relatively remote from the perimeter of the opening to minimize the capacitance between the FM conductor and the body portion, the FM conductor having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for maximizing the current developed at the common terminal in response to FM radio signals thereby to optimally receive such FM radio signals; an AM conductor supported within the opening by the window and including a pair of parallel spaced conductor sections connected in series relationship to the common terminal, the AM conductor sections extending approximately parallel to the major axis of the opening adjacent the perimeter of the opening to minimize interference with vision through the window, the AM conductor sections each having an effective length approximately equal to one-quarter wavelength of the frequencies in the FM frequency band for maximizing the impedance at the common terminal in response to FM radio signals thereby to minimize interference with the reception of such FM radio signals by the FM conductor; and means for coupling the received AM and FM radio signals from the common terminal to the radio receiver.