Series Of Continuous Modes Research Articles

Design of a broadband high-efficiency power amplifier based on ring-resonant filter with compensation architecture and a series of continuous modes

Design of a broadband high-efficiency power amplifier based on ring-resonant filter with compensation architecture and a series of continuous modes

Codesign of High-Efficiency Power Amplifier and Ring-Resonator Filter Based on a Series of Continuous Modes and Even–Odd-Mode Analysis

A method enabling the codesign of a high-efficiency power amplifier (PA) and a ring-resonator microstrip bandpass filter is proposed in this paper. Even–odd-mode analysis and a series of continuous modes (SCMs) are combined to realize broadband or multiband impedance matching as well as the suppression of undesired signals. The proposed codesign method can achieve both broadband and multiband frequency responses, and the designed component is relatively easy to analyze and fabricate due to its microstrip structure. For verification, a broadband and triband PA-filter components are designed and fabricated separately. The first component operates across 0.8–3.2 GHz (120%) with 39.7–42.9-dBm maximum output power and 57%–74% drain efficiency (DE). The second component, which has three passbands, covers several commercial frequencies with a measured output power of 39.6–41.3 dBm and DE from 62% to 68%. When these two components are driven by a 20-MHz long-term evolution signal with a peak-to-average power ratio of 6.2 dB, adjacent channel leakage ratios from −26.4 to −33.8 dBc and from −29.4 to −33.1 dBc are measured, respectively.

Design of multioctave power amplifiers based on high order resistive‐reactive series of continuous modes

AbstractIn this article, the high order resistive‐reactive series of continuous modes (H‐R‐R‐SCMs) approach is presented to design multioctave bandwidth power amplifiers (PAs). By introducing the high order resistive term, the ranges of the second harmonic impedances are expanded, which will be very effective for designing the multioctave bandwidth PAs. Based on the proposed method, a broadband high‐efficiency PA working from 0.5 to 3.1 GHz (144% relative bandwidth) is designed. According to the measured results, the PA achieves 12.0–14.3 dB power gain and 12.6–21.4 W output saturation power in the operation band. The drain efficiency varies from 56.3 to 76.6% over the whole multioctave bandwidth.

Design of broadband high‐efficient PA based on hybrid continuous modes

An ultra-wide band high-efficient power amplifier (PA) which employs both series of continuous modes and series of inverse continuous modes is presented for the first time. Consequently, the solutions space of fundamental impedance is expanded greatly. The operation frequency range of this mode can achieve more than two-octave bandwidth. Multistage transmission-line low-pass filter matching network has been utilised for matching fundamental impedance and suppressing of high-order harmonic. To verify this method, a high-efficient PA, which operates across 0.3–2.7 GHz (160% bandwidth) is designed. Simulation and experimental results show that the drain efficiency of this PA achieves 61.4–81.9%, and 8.3–16.6 W output power in the target band.

Design of Broadband Power Amplifiers Based on Resistive-Reactive Series of Continuous Modes

In this letter, the bandwidth of the series of continuous modes (SCMs) power amplifiers (PAs) is extended. The SCMs are composed of a series of continuous working modes between Class-B/J and Class-F continuums. The second harmonic load of the series of continuums is purely reactive. By introducing resistive part to the purely reactive second harmonic load of the series of continuous modes, the operation bandwidth of power amplifiers is expanded. A broadband PA working across 0.8–3.05 GHz (117% bandwidth) is simulated and fabricated. Experimental results show that the drain efficiencies in interesting band are 57.4%–79%. The fabricated PA can deliver output power of 10.1–20.7 W.