A New Design Approach of Low-Noise Stable Broadband Microwave Amplifier Using Hybrid Optimization Method

Shirkolaei, Morteza Mohammadi

doi:10.1080/03772063.2020.1787879

Cited by 12 publications

(10 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Te research results are very meaningful. A very interesting compensation matching method is also proposed for the design of the stable low-noise broadband microwave amplifer [91]. A hybrid optimization algorithm based on the combination of the genetic algorithm and conjugate gradients method is used to obtain low-noise fgure, gain fatness, stability, and loss factor correlated with each reactive element and matching network accomplishment included together.…”

Section: Efect Of Element Feed Errormentioning

confidence: 99%

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Wang

et al. 2023

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

Active phased array antenna (APAA) is a representative of complex electronic equipment, and it plays significant roles in scenarios such as battlefield situation perception, aviation guidance, and communication. It has become the core equipment in land, navigation, and aeronautical applications. With the continuous improvement of technical changes and military requirements, the working frequency band, pointing accuracy, gain, and low sidelobe level of APAA increase, and the multi-disciplinary design contradiction between antenna electrical performance and structure and temperature becomes increasingly prominent. As a result, the electrical performance of APAA in service is prone to be affected by the external complex environments. The structural-electromagnetic-thermal (SET) coupling problem has become a key problem restricting the development of APAA. This paper has summarized the structural features and environmental loads of advanced APAA on different platforms and provided design basis and principle for antenna designer. And then the SET coupling theory of APAA has been introduced, which can be applied in both the design and manufacturing stage, as well as the performance control technology in service environment of APAA. This theory helps to analyze the impact of environmental factors, such as antenna structure deformation, radome high-temperature ablation, and feed errors, on the antenna's performance. For 128 × 768 spaceborne array antenna, in the range of 25∼85°C, the gain of antenna decreases with the increase of operating temperature and decreases by 0.015 dB with each increase of 1°C. The key design parameters in the fields of antenna manufacturing accuracy, efficient heat dissipation, and lightweight design are also analysed; for 32 × 32 rectangular planar phased array antenna, the gain of antenna decreases by 2.715 dB when the random error of installation position in x, y, and z direction reaches 1/10 of the wavelength. In addition, condition monitoring, displacement field reconstruction, and electrical performance compensation of APAA have also been touched to help engineers maintain and guarantee the antenna performance throughout its life cycle. Finally, the future research direction of SET technology of APAA has been discussed, and SET technology is extended to more fields such as antenna parameter uncertainty, high-frequency circuit electronics manufacturing, and electronic equipment performance guarantee.

show abstract

Section: Efect Of Element Feed Errormentioning

confidence: 99%

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Wang

et al. 2023

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

show abstract

“…As illustrated in Figure 1, the LFM signal generator circuit generates baseband signal which is mainly based on an FPGA and a dual‐channel DAC. Then, in the radio‐frequency (RF) circuit, in‐phase/quadrature (I/Q) signals are modulated by a quadrature modulation unit to the carrier frequency; this RF signal is filtered and amplified by a low‐noise amplifier [10]. After pre‐amplifier unit saturating this RF signal, the full‐power transmitting signal can radiate to free space by waveguide slot antenna [11–13].…”

Section: Introductionmentioning

confidence: 99%

A novel linear frequency modulation signal generator in real‐time processing of airborne synthetic aperture radar

Chen

Wei

et al. 2023

The Journal of Engineering

View full text Add to dashboard Cite

Generally, synthetic aperture radar(SAR)generates linear frequency modulation (LFM) signals by method of look-up table (LUT), which requires calculating different LFM signals and storing these waveforms in advance. With the demand for multi-mode, high-resolution and wide swath of airborne SAR systems, the method of LUT is not available, because that requires huge storage resources. In order to solve these drawbacks in limited hardware resources, this letter proposes a novel LFM signal generator in real-time processing. By taking advantage of high level synthesis (HLS) on FPGA, the proposed generator calculates the LFM signal simply using parameters of pulse width, bandwidth, and sampling frequency. Meanwhile, in order to compensate for the SAR system phase error, the proposed generator calculates phase error using a linear polynomial algorithm, which can compensate for the phase error in real time. The simulation results prove that this approximation can achieve a good effect. The performance of this method is implemented by experiments with an X-band airborne SAR system.

show abstract

“…But it has a gain of only 10 dB and NF of 3.1 to 4.1 dB. Also, a broadband LNA design using a hybrid optimization method has been proposed in [14]. This LNA designed using GaAs transistor and discrete components has demonstrated a very good NF < 1 performance but has a gain of only 11.5 dB across 8 GHz to 16 GHz.…”

Section: Introductionmentioning

confidence: 99%

A Ku-band LNA with 39.2 dB gain, 1.4 dB NF and shunt inductor-based matching network

Kumar,

Ravichandran

2023

Eng. Res. Express

View full text Add to dashboard Cite

A low-noise amplifier (LNA) with minimum noise figure, improved gain, operating at Ku-band, and designed using 0.13 μm bipolar complementary metal oxide semiconductor(BiCMOS) technology is described in this article. BJT along with a matching network comprising of a shunt inductor is used for optimizing noise/impedance matching in the proposed common emitter (CE) LNA with inductive emitter degeneration. Thereby, achieving ultra-low NF and gain performance along with inbuilt ESD protection circuitry. Also, the detailed mathematical analysis of design steps, impact of impedance matching network on gain and NF performance of conventional and proposed CE LNA with inductive emitter degeneration are elaborated. This proposed LNA has demonstrated a maximum gain of 39.2 dB, almost static NF of 1.4 dB to 1.64 dB across a frequency bandwidth of 2 GHz from 15.2 GHz to 17.2 GHz. It has also demonstrated a figure-of-merit (FoM) of 18.42, IP 1dB of −29.7 dBm at 16 GHz, a power intake of 24.2 mW, and layout space of 0.468 mm2.

show abstract

A New Design Approach of Low-Noise Stable Broadband Microwave Amplifier Using Hybrid Optimization Method

Cited by 12 publications

References 20 publications

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

A novel linear frequency modulation signal generator in real‐time processing of airborne synthetic aperture radar

A Ku-band LNA with 39.2 dB gain, 1.4 dB NF and shunt inductor-based matching network

Contact Info

Product

Resources

About