Miniature ultra-wideband active receiving antenna

An active radio frequency reception circuit comprising:

• a. an antenna probe element adapted to sense an electric field;
• b. said element coupled to one of the gate and base of a transistor;
• c. one of the source and emitter of said transistor coupled to ground;
• and
• d. one of the drain and collector of said transistor coupled in a Cascode arrangement to another transistor that is coupled to a radio frequency receiver device.

A circuit for coupling an element adapted to sense an electrical field to a receiver over a predetermined bandwidth of radiofrequency energy, comprising:

• a. an element adapted to sense an electrical field;
• b. a high transconductance FET, whose gate is coupled to the element;
• c. wherein the FET source is coupled to ground;
• d. wherein the FET drain is adapted to be coupled to a receiver via at least one device which is adapted to enhance signals presented by the network to the receiver;
• and
• e. wherein the element is not resonant to the predetermined bandwidth of radiofrequency energy.

A circuit for coupling an element adapted to sense an electrical field to a receiver over a predetermined bandwidth of radiofrequency energy, comprising:

• a. an element adapted to sense an electrical field;
• b. a high transconductance FET, whose gate is coupled to the element;
• c. wherein the FET source is coupled to ground;
• d. wherein the FET drain is adapted to be coupled to a to a receiver via:
• (i) a bipolar junction transistor whose emitter is coupled to the FET drain in a cascode amplifier relationship and whose collector is adapted to be coupled to the receiver;
• and
• (ii) a feedback loop between the collector of the bipolar junction transistor and the source of the FET, which feedback loop includes a transformer having a first side coupled to the collector of the bipolar junction transistor and a voltage source, and a second side coupled to ground and the FET source;
• and
• e. wherein the element is not resonant to the predetermined bandwidth of radiofrequency energy.

A circuit for coupling an element adapted to sense an electrical field to a receiver over a predetermined bandwidth of radiofrequency energy, comprising:

• a. a first and a second element adapted to sense an electrical field;
• b. for the first element:
• (i) a first high transconductance FET whose base is coupled to the first element and whose source is coupled to ground;
• and
• (ii) a first bipolar junction transistor whose emitter is coupled to the drain of the first FET and whose collector is coupled to a transformer;
• c. the transformer including:
• (i) a first side coupled to the collectors of each of the two bipolar junction transistors and tapped between the couplings to said collectors to a voltage source;
• and
• (ii) a second side adapted to be coupled to a receiver;
• d. wherein the first and second elements are not resonant to the predetermined bandwidth of radiofrequency energy.