Low Noise Amplification

Uenohara, M.

doi:10.1007/978-3-642-46071-5_1

Cited by 4 publications

(2 citation statements)

References 59 publications

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“…Spatial growth is established as the whistler propagates though an activated plasma medium, which has a negative conductivity at the matched wave frequency ω 1 . Negative conductance has long been known for microwave parametric amplifiers [43], but not for plasma devices. The whistler wave and idler wave grows exponentially when passing through this medium until either the signal leaves the active region or the LH pump wave is depleted by transferring electrostatic energy to the idler and signal waves.…”

Section: Discussionmentioning

confidence: 99%

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The Whistler Traveling Wave Parametric Amplifier Driven by an Ion-Ring Beam Distribution from a Neutral Gas Injection in Space Plasmas

Bernhardt

2021

IEEE Trans. Plasma Sci.

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A new parametric amplifier model describes the observations of intensified whistler waves produced by a dedicated burn of the BT-4 engine on the Cygnus spacecraft during the NG-13 mission. Ground very low frequency (VLF) radio emissions at 25.2 kHz from a Navy NML transmitter in North Dakota were amplified by 20-30 dB during the Cygnus burn at 480-km altitude and recorded at 1060 km by the e-POP/RRI plasma wave receiver on the SWARM-E satellite. The amplification process starts with charge exchange between the exhaust molecules and the ambient O+ in the ionosphere to produce water vapor ions that spiral around the earth's magnetic field lines. This ion-velocity-ring distribution generates broadband, oblique-lower-hybrid (OLH) waves, which act as a pump for the parametric amplifier. The nonlinear ponderomotive force on the electrons causes the high-amplitude OLH pump to mix with the input whistler signal, yielding an OLH idler wave. Resonant mixing of the pump and idler electric fields promotes temporal growth in the amplitude of the whistler waves as they propagate through the exhaust cloud. The key features to rocket exhaust-driven amplification (REDA) process are broadband gain, bi-directionality along the magnetic field, pump depletion, phasing, and feedback. Pump depletion limits the intensity of the output whistler waves by wave energy conservation. The total wave energy is the electrostatic energy of the pump and idler lower hybrid waves plus the energy extracted by the propagating whistler signal. The whistler traveling wave parametric amplifier provides an efficient mechanism for active amplification of signals in space.

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Section: Discussionmentioning

confidence: 99%

“…yielding a negative conductivity that represents the wave growth. Negative conductivity is a common feature of microwave parametric amplifiers [43]. With these conductivities, (29) becomes…”

Section: Pump Depletion and Signal Propagationmentioning

confidence: 99%

The Whistler Traveling Wave Parametric Amplifier Driven by an Ion-Ring Beam Distribution from a Neutral Gas Injection in Space Plasmas

Bernhardt

2021

IEEE Trans. Plasma Sci.

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Space applications of superconductivity: resonators for high stability oscillators and other applications

Stein¹

1980

Cryogenics

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Performance Analysis of Inductively Degenerated Cmos Lna

et al. 2016

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This paper features the design approach of a low noise amplifier (LNA) which dissipates 19.89 mW from a 1.2 V power supply that was designed based on a 0.13 μm RFCMOS process. A detailed methodology that leads to a power-efficient design of the LNA is presented. A theoretical noise figure optimization using fixed power and physics-based gm/ID characteristics were used as a design optimization guide. Simultaneous noise and input matching under constrained power (PCSNIM) was achieved with an extra gate-source capacitor while gain enhancement was obtained by employing a capacitive feedback at the cascode transistor. The LNA is further optimized by implementing the forward biasing scheme to attain good LNA performance at low power. The end-design of the optimized LNA produces a noise figure of 3.55 dB, a power gain of 17.12 dB, a Third Order Input Intercept Point (IIP3) of -19.70 dBm, an input reflection coefficient of -14.15 dB and an output reflection coefficient of -18.37 dB. Simulated results validate peak performance at 2.45GHz, which makes the LNA suitable for Bluetooth and the industrial, scientific and medical (ISM) applications.

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Low Noise Amplification

Cited by 4 publications

References 59 publications

The Whistler Traveling Wave Parametric Amplifier Driven by an Ion-Ring Beam Distribution from a Neutral Gas Injection in Space Plasmas

The Whistler Traveling Wave Parametric Amplifier Driven by an Ion-Ring Beam Distribution from a Neutral Gas Injection in Space Plasmas

Space applications of superconductivity: resonators for high stability oscillators and other applications

Performance Analysis of Inductively Degenerated Cmos Lna

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