Active high frequency transmitter antenna assembly
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorPaul M. Mileski
Life of this patent
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Abstract
A combined antenna transmitter joined for transmitting a message signal includes a switching signal source modulated by the message signal. The switching signal is provided to a transistor at an operating frequency. The transistor switches a high voltage input through the transistor, a choke inductor and a boost inductor. A bypass capacitor is provided between the inductors for shielding the high voltage input. An antenna is connected between the boost inductor and the transistor for transmitting a radio frequency signal at the operating frequency. There is thus provided a compact, efficient transmitter and antenna assembly for transmitting modulated message signals.
Claims15
A combined antenna transmitter joined for transmitting a digital signal comprising:
- a switching signal source modulated by the digital signal, said switching signal source providing a switching signal at an operating frequency;
- a transistor having a gate input joined to said switching signal source for switching said gate input, said transistor further having a drain and a source;
- a boost inductor having a first contact joined to said transistor drain and a second contact;
- a choke inductor having a first contact joined to said boost inductor second contact and a second contact;
- a direct current voltage source having a positive terminal joined to said choke inductor second contact and a ground terminal joined to said transistor source;
- an antenna joined between said transistor drain and said boost inductor first contact;
- and
- a capacitor having a first contact joined between said boost inductor second contact and said choke inductor first contact and a second contact joined to said direct current voltage source ground terminal.
A transmitter antenna assembly comprising:
- a sensor providing a digitized signal;
- a switching signal source modulated by the digitized signal, said switching signal source providing a switching signal at an operating frequency;
- a transistor having a gate input joined to said switching signal source for switching said gate input, said transistor further having a drain and a source;
- a boost inductor having a first contact joined to said transistor drain and a second contact;
- a choke inductor having a first contact joined to said boost inductor second contact and a second contact;
- a direct current voltage source having a positive terminal joined to said choke inductor second contact and a ground terminal joined to said transistor source;
- an antenna joined between said transistor drain and said boost inductor first contact wherein said antenna is provided less than twelve feet from the surface of a surrounding conductive medium;
- and
- a capacitor having a first contact joined between said boost inductor second contact and said choke inductor first contact and a second contact joined to said direct current voltage source ground terminal.
Dependencies are inferred from the claim text.