High-Power RF Generation From Nonlinear Transmission Lines With Barium Titanate Ceramic Capacitors

Neto, L. P. Silva; Rossi, J.O.; Barroso, Joaquim J.; Schamiloglu, E.

doi:10.1109/tps.2016.2628324

Cited by 38 publications

(7 citation statements)

References 10 publications

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“…3 the soliton wave shows a voltage modulation depth (VMD) of the order of 10.7 V and generated frequency of 33.3 MHz for a terminated 50 Ω load. As discussed in the introduction section the NLTL uses a nonlinear component, in this case a varactor diode, which produces a nonlinear impedance Z(V) as a function of applied voltage, calculated by (1) where L is linear inductance and C(V) is the nonlinear capacitance as function applied voltage.…”

Section: Methodsmentioning

confidence: 99%

“…Radiofrequency waves have been used as a way of transmitting information a long time ago, for example broadcasting communication using amplitude modulation and frequency modulation. This system is composed by oscillator, modulator, filters, amplifiers and antennas [1]. In this work we use a low power nonlinear transmission lines NLTL as a source of radiofrequency signal.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of an RF circuit amplifier fed by a low power nonlinear transmission line

Neto

Moraes

Rossi

et al. 2019

2019 IEEE Pulsed Power &Amp; Plasma Science (PPPS)

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Lumped nonlinear transmission lines have been studied for the generation of radio frequency signals in the range of the order of tens of MHz up to a few hundreds of MHz depending on the nonlinear element used in the LC line. The oscillations obtained at the output of these lines are applied in defense mobile platforms and communications systems. Low power nonlinear transmission lines use varactor diodes as nonlinear elements, which show a strong nonlinear effect with capacitance variation of the order of 90% at their P-N junction with the applied voltage, which is an excellent performance to obtain oscillations at the line output. However, these semiconductor devices operate at low voltage, producing small voltage modulation depth, low power, and consequently reduced signal range. Looking for increasing the voltage modulation depth of the signal generated with nonlinear transmission lines, this work developed a radiofrequency amplifier using a Metal Oxide Semiconductor Field Effect Transistor -MOSFET model RD06HVF1. A 30-section line using varactor diodes MV209 as nonlinear elements can work as an RF source to obtain oscillations with a frequency of 33.3 MHz at the line output. By means of SPICE simulations, it has been demonstrated that an amplifier circuit connected to the output of this varactor diode transmission line can produce an increase of the voltage modulation depth produced at line output from 10.7 V to 40 V approximately, thus allowing higher level power to electromagnetic wave propagation and consequently higher signal range. Experimental comparison using a PCB prototype with the corresponding simulation will be also shown.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of an RF circuit amplifier fed by a low power nonlinear transmission line

Neto

Moraes

Rossi

et al. 2019

2019 IEEE Pulsed Power &Amp; Plasma Science (PPPS)

View full text Add to dashboard Cite

show abstract

“…Another NLTL created using COTS capacitors with BT as the main component in the dielectric achieved measured risetimes between 1.84 and 2.5 µs, in agreement with 2.2 µs from simulations. The output pulse had a peak power of 8 kW for an output frequency of approximately 4 MHz [35].…”

Section: B Experimental Contributionsmentioning

confidence: 99%

A Review of Nonlinear Transmission Line System Design

2020

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Nonlinear transmission lines (NLTLs) have been increasingly studied to produce high power microwaves (HPM) at higher repetition rates than conventional HPM devices without requiring the same auxiliary systems. The ability to array NLTLs to produce higher power and achieve beam steering provides an additional capability. This review summarizes the various NLTL topologies designed to achieve these design objectives. Specifically, we summarize modeling and experimental studies for three primary topologies: the lumped element NLTL, the split ring resonator, and the traditional transmission line geometry using nonlinear materials. The lumped element NLTL and the traditional transmission line constructed with nonlinear materials lend themselves to higher power applications, while the split ring resonator is better suited for applications involving antennas. We provide a detailed summary of past studies for these topologies and conclude by exploring ongoing work and future opportunities for technological development.

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“…The line using nonlinear capacitor C(V) is denominated a nonlinear capacitive line (NLCL) and another one using inductor L(I) called nonlinear inductive line (NLIL). More details as soliton waves are generated at the output of NLTL can be found in earlier literature [3], [4]. The NLTL using ceramic capacitors can reach hundreds of kWs for RF peak power [5]; however, to study their behavior in low power range varactor diodes are used as nonlinear elements.…”

Section: Introductionmentioning

confidence: 99%

Improving the voltage modulation depth and RF power generated on Nonlinear Transmission lines

Neto¹,

Rossi

Barroso

et al. 2018

2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC)

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Nowadays Nonlinear Transmission Lines-NLTL have been studied for RF generation to be applied in different systems of communications such as satellite, military and biomedical applications. NLTL is built by using a network composed by inductors and capacitors, where at least one of these components need to have a nonlinear behavior. One limiting factor for applications is in the peak power range, and a way to increasing this is improving voltage modulation depth-VMD, which is main goal of this work. In this work, it is simulated and built three configurations of NLTLs using ceramic capacitors to improve VMD and consequently the RF power generated at the output. As shown by the results the cross-link configuration is the best method due to the highest VMD generated.

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High-Power RF Generation From Nonlinear Transmission Lines With Barium Titanate Ceramic Capacitors

Cited by 38 publications

References 10 publications

Development of an RF circuit amplifier fed by a low power nonlinear transmission line

Development of an RF circuit amplifier fed by a low power nonlinear transmission line

A Review of Nonlinear Transmission Line System Design

Improving the voltage modulation depth and RF power generated on Nonlinear Transmission lines

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