Harmonic Beamforming Based on Modified Single-Sideband Time Modulated Phased Array and Its Enhanced Version
نویسندگان
چکیده
Recently, harmonic beamforming in the time-modulated array (TMA) has attracted much attention. In this study, two kinds of systems TMA based on single-sideband phased (STMPA) and enhanced STMPA are presented, +1 st is performed. Based basic structure ESTMPA, we transform design I/Q modulator, then modified (MSTMPA) ESTMPA (MESTMPA) presented. The channels an modulator each connected to antenna with other structures keep constant. Hence, number antennas can be multiplied, system complexity reduced increase especially for large-scale applications. addition, aperture enlarged same modulators, performance beam pattern improved. However, without single sideband structure, ( $4k-1\cap 3k)^{\mathrm {st}}$ notation="LaTeX">$8k-1$ ) harmonics cannot eliminated; therefore, bandpass filter used at output system; thus, extracted. derivations analysis given detail, compared. Finally, effectiveness proposed verified by simulation results formed desired directions.
منابع مشابه
Phased array ultrasonic imaging using an improved beamforming based total focusing method for non destructive test
One of the novel ultrasonic phased array based scanning methods for ultrasonic imaging in non-destructive test is total focusing method (TFM). This method employs maximum available information of the phased array elements and leads to an improved defect detection accuracy compared to conventional scanning methods. Despite its high detection accuracy, TFM behaves weak in distinguishing the real ...
متن کاملPhased array ultrasonic imaging using an improved beamforming based total focusing method for non destructive test
One of the novel ultrasonic phased array based scanning methods for ultrasonic imaging in non-destructive test is total focusing method (TFM). This method employs maximum available information of the phased array elements and leads to an improved defect detection accuracy compared to conventional scanning methods. Despite its high detection accuracy, TFM behaves weak in distinguishing the real ...
متن کاملQuantization Analysis for Reconfigurable Phased Array Beamforming
In reconfigurable phased array radars beamforming is performed in the digital domain. Digital implementation can be carried out using finite precision and infinite precision representation of the phased array signal. We consider finite precision representation, since it takes considerably less implementation resources compared with the infinite case. In this paper we analyze quantization effect...
متن کاملPhotonic Integrated Circuits for Phased-array Beamforming
Photonic integration is very promising to bring down volume and weight of phased-array beamforming networks. In addition, photonics allows for increased functionality for widebandwidth systems. In this paper we demonstrate the feasibility of phase and amplitude control of a 16-element phased-array antenna with a single InP integrated circuit. The concept and design of an optical phase locked lo...
متن کاملEnhanced Linear-array Photoacoustic Beamforming using Modified Coherence Factor
Photoacoustic imaging (PAI) is a promising medical imaging modality providing the spatial resolution of ultrasound imaging and the contrast of optical imaging. For linear-array PAI, a beamformer can be used as the reconstruction algorithm. Delay-and-sum (DAS) is the most prevalent beamforming algorithm in PAI. However, using DAS beamformer leads to low-resolution images as well as high sidelobe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Access
سال: 2021
ISSN: ['2169-3536']
DOI: https://doi.org/10.1109/access.2021.3072777