In this article, a load-modulation enhanced wideband compact high-efficiency millimeter-wave (mm-wave) gallium nitride (GaN) monolithic microwave integrated circuit (MMIC) synchronous Doherty power amplifier (DPA) is presented. A DPA architecture used to ensure the optimal saturation performance at mm-wave band. Based on analysis of behavior, bandwidth can be extended by decreasing phase dispersion factor <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

In this article, a 2-D <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$16 \times 16$ </tex-math></inline-formula> Butler matrix-based passive multibeam antenna array (MBAA) and active–passive hybrid MBAA (APHMBAA) are both presented for fifth-generation (5G) millimeter-wave (mmWave) applications, which demonstrate that coverage can be achieved by two types of 1-D beamformers in orthogonal planes at analog...

This brief firstly presents a monolithically microwave integrated circuit (MMIC) load-modulated balanced amplifier (LMBA) developed in 0.15 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu {\mathrm{ m}}$ </tex-math></inline-formula> GaN process. In this brief, the asymmetric output coupler is applied for further enhancing power and back-off (OBO) efficiency over larger OBO range. MMIC LMBA operating...

A band-limited canonical piecewise-linear function (CPWL)-based model is proposed for wideband power amplifiers (PAs). The has a similar structure of the dynamic deviation reduction (DDR) Volterra series but without high-order terms and long finite impulse response filters, which are replaced by CPWL. lower complexity more flexibility than DDR parameters can be estimated least-square method. Experimental results show that nearly gives same normalized mean square error digital predistortion...

A kind of novel general multiband digital predistortion (DPD) model is proposed for the linearization multifrequency transmitters. By theoretical analysis, we extend existing instantaneous sample indexed magnitude-selective affine (IMSA) function-based to multidimensional cases, which includes 2-D-IMSA and 3-D-IMSA concurrent dual-band triband scenarios, respectively. The core new models use IMSA function replace complex basis classic through method segmentation approximation. After...

This paper proposes multi-mode transferred power amplifier design. Several discrete frequency points, along with their second and third harmonics are controlled simultaneously by a special output matching network in PA. It allows the PA to transfer its mode different typical high efficiency classes these deliberately selected frequencies, which referred LTE 3G systems. The measurement results show (>72%) including 1.9GHz, 2.0GHz 2.6GHz. Also, shows broadband characters, achieving 58%-76%...

Digital predistortion technique has become more and important in the modern mobile communications due to its excellent IMD suppression. In this paper, a new baseband digital system based on complex gain look-up table simplified linear convergence algorithm is developed, simulated tested using hardware-EDA software combined testing solution. Trustful result got from real test PA shows as much 15dB reduction ACPR can be achieved with our system.

Summary This paper presents Doherty power amplifier (DPA) based on gallium nitride (GaN) technology, incorporating a parallel grounded network with series RC elements in front of the carrier and peaking amplifiers to enhance circuit stability. In comparison traditional structure, this configuration effectively reduces sensitivity stability factor K capacitance value within network. Consequently, it mitigates impact various performance indicators such as gain drain efficiency, addressing...

This paper presents a low temperature cofired ceramic (LTCC) package with radio frequency (RF) circuitry and fluidic chamber. The RF power chips can be arranged closely over the cooling chamber, which provides good heat transfer performance. fabricated chamber size of 20 mm × 0.4 keeps its shape well, inside 3 pin-fin array have been added to improve thermal mechanical performance LTCC substrate. transmission lines such as CPW quasi-coaxial vertical transition in show up 12 GHz, while...

In this article, the development of a high-efficiency power amplifier (PA) with inverse class-F configuration and novel 3/4 spiral defected ground structure (DGS) is presented. The proposed DGS has improved rejection characteristic its resonance frequencies are more convenient to adjust than conventional symmetric asymmetric structure. electromagnetic-simulated result shows that circuit harmonic control performance simplified less return loss microstrip circuit. harmonics (HCC) can be...

A novel undersampled feedback signal iterative learning control (US-ILC-DPD) technique is proposed to linearize RF power amplifiers (PAs). The method combines the existing (ILC) with processing. It can keep good linearization performance and avoid using high speed ADCs, which are normally expensive costly. In addition, advantages of ILC-DPD, such as low computational complexity fast convergence rate, all preserved in this approach. linearization, an RFPA excited by a 20-MHz LTE signal,...

This paper demonstrates the application of nonlinear embedding model in matching network design for a class F power amplifier. The provides access to intrinsic current generator and enables waveform shaping by directly loading intrinsically with ideal open or short terminations. load impedance at external package reference plane can be calculated model, resulting optimal needed design. Unlike computationally expensive pull analysis, only requires single simulation determine impedances...

This paper gives a brief introduction of the proposed metal-integrated and substrate integrated suspended line (MI-SISL) technology, which is demonstrated as an attractive plat-form for high power high-efficiency amplifier integration with superiorities high-performance self-packaging two MI-SISL based amplifiers (PAs) 5G applications are introduced demonstration cases.

Summary This paper presents a broadband monolithic millimeter‐wave integrated circuit GaN power amplifier (PA) with arbitrary two‐port complex‐impedance matching method. The proposed topology has been applied to interstage network design by modifying traditional coupling matrix and synthesizing desired network. optimum load traction technique is introduced provide some more suitable Z opts . After continuous‐wave test, the three‐stage MMIC PA achieves peak PAE of 39.1% 34.9 dBm output from...

A novel 2-D envelope combination selective affine function-based (2D-ECSA) behavioral model is proposed for linearization of the concurrent dual-band power amplifiers (PAs). The core to use two independent (ECSA) functions replace high-order terms composed input envelopes existing simplified memory polynomial (2D-SMP) model, respectively. 2D-ECSA can be regarded as superposition linear structures, which further reduce computational complexity and actual hardware resource occupation 2D-SMP...