Communications: radio wave antennas – Antennas – Having electric space discharge device
Reexamination Certificate
2005-07-12
2005-07-12
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Having electric space discharge device
C343S793000, C455S291000, C455S269000, C330S311000
Reexamination Certificate
active
06917336
ABSTRACT:
According to some aspects of this invention, a compact, broadband active receiving antenna uses one or more high transconductance transistors such as Field Effect Transistor(s) paired with another Transistor and arranged in a Cascode amplifier configuration. Some embodiments involve a single high transconductance transistor arranged with a high efficiency transformer in a nondissipative feedback loop to improve linearity and dynamic range. The devices have a high input resistance, low input capacitance, low noise and a very high second and third order Intercept Point. Since the gain is primarily a function of the amplifying electronics, it is not necessary to increase the directivity of the antenna to achieve higher gain.
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Borland Glenn
Long Christopher David
Rowser Andrew
Alemu Ephrem
Chen Shih-Chao
Dotcast, Inc.
Perkins Coie LLP
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