Abstract Achieving high-efficient and low-power communication is pivotal yet very challenging in the emerging technologies. Unlike conventional backscatter system, we propose demonstrate an amplitude-reconfigurable metasurface loaded with PIN diodes to build a front-back scattering transmitter, which features exclusive advantages of full-space secondary modulation ambient signals high energy utilization efficiency. Meanwhile, this device can eliminate interference originated from source by...

A reconfigurable folded transmitarray antenna (RFTA) with fully planar structure is presented in this letter. It consists of an electronically metasurface and a polarization rotating (PRMS). pair PIN diode switches integrated on the meta-atom to realize 1-bit transmission phase manipulating, patch center PRMS feed RFTA. Through twice reflecting, rotating, compensation, spherical wave from transformed into scannable pencil-shaped beam. Meanwhile, profile reduced about 1/3 compared traditional...

This article proposes a symbiotic backscatter non-orthogonal multiple access (backscatter-NOMA) system, where device (BD) conveys its own information <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$c(n)$</tex-math></inline-formula> to two users by riding on the NOMA downlink signal. Notably, different from conventional backscatter-NOMA, BD adaptively adjusts reflection coefficient guarantee successful...

Rocky slopes lack the necessary conditions for plant growth, i.e., soil and water, making vegetation recovery difficult necessitating artificial establishment. Water-retaining agents are essential functional substances constructing on rocky slopes. In this study, effect of water-retaining growth nutrient loss was investigated by setting different application rates (10 g/m2, 20 30 40 50 g/m2). Artificially simulated slope were achieved using guest spraying technology after hanging net, which...

This paper proposes a reconfigurable intelligent surface (RIS) segmented symbiotic ambient backscatter system, which is composed of primary source (S), RIS, and cooperative receiver (D) that decodes the signals from S RIS with aid successive interference cancellation (SIC). For such, into two zones, namely, an EP zone BD zone, where used to enhance received signal at D while utilized RIS's D. The coexistence outage probability (COP) first developed, shown be dominated by minimum number...

This article investigates a symbiotic ambient backscatter communication (AmBC) system, where for the primary source node T1 transmits information to destination T2. Whereas by riding on T1's signal, device passively conveys its own <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$c(n)$ </tex-math></inline-formula> and T2 via backscattering. For such, coexistence outage probability (COP) ergodic capacity...

In this letter, we propose a novel high-gain four-level pulse amplitude modulation (PAM4) baud-rate phase detector (BRPD) for the ADC-based high-speed clock and data recovery (CDR) circuit. The PAM4 decisions are generated by three adjacent error types. addition, linear model of proposed BRPD is developed first time to precisely calculate gain, which also critical analyzing key characteristics BRPD-based CDR. Moreover, such CDR designed with 12nm CMOS technology supplied 0.8 voltage....

Concerning the difficulty in guarantee ability of radar complex antagonism environment without prior information and itself passively against interference receiver after jamming signal enters receiver. An suppression approach based on waveform watermarking technology is presented(A method proposed.). First all, influence modulation parameters time domain spectrum MPPSK analyzed, then a technique using modulated as medium frequency carrier presented. On this basis, two pulse cancellation...

This paper proposes a frequency domain model for injection-locked LC oscillators by introducing the impulse sensitivity function (ISF) and injection factor, analyzes effect of pulse width position on oscillator performance based this model, derives an equation that can guide design optimization oscillators. The fills gap in field models Based above clock generator circuit structure operating at 14 GHz, combining phase-locked loop with oscillator, is designed measured 65-nm cmos process....

This paper analyzes the performance requirements that need to be met by a clock generator applied low-temperature quantum computer and negative effects on circuit under conditions. In order meet proposed in this suppress brought about low temperature, for ultra-low-temperature computing is designed. designed using F-CLASS Voltage Controlled Oscillator (VCO), power filter, tail resistor, differential charge pump, other techniques. And noise characteristics of are analyzed Impulse Sensitive...

This paper proposes a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) segmented symbiotic backscatter non-orthogonal multiple access (NOMA) system, where the STAR-RIS is composed of an enhancing primary signal (EP) zone device (BD) zone. To evaluate overall system transmission reliability, we derive tight lower bound coexistence outage probability (COP), imperfect/realistic successive interference cancellation (SIC) considered. It shown analytically...

To meet the demand of information modulation and demodulation in RIS communication system, this paper realizes a signal method that can realize 16QAM by manipulating phase electromagnetic space only RIS. This relies on system continuously adjust signal, which control to modulate any completely at RF voltage segment, achieve complete coarse synchronization, CFO correction, fine synchronization accurate restoration sent code element receiver side. is verified experiments USRP environment...

This paper designed a low noise 14 GHz phase-locked loop (PLL) for high-speed serial interface. We use differential structure with feedback charge pump to reduce the system's common-mode and current mismatch. To further phase noise, of third-order filter is introduced, which can also decrease chip area. By using control capacitor, nonlinear VCO be alleviated. The PLL adopts TSMC 65nm CMOS technology, working voltage system 1.1v. Simulation results show that locking time 800ns 107dBc/Hz at 1MHz.

Cascaded fading plays a vital role in backscatter communications but its effect on the transmission robustness of symbiotic system has not been well understood yet. In this paper, we investigate under three mechanisms, namely commensal, parasitic and competitive schemes. Our analysis indicates that: 1) For commensal scheme, cascaded incurs an inferior outage performance comparison with counterpart over single-hop fading; 2) leads to superior primary 3) system, regardless or fading, exact...

&lt;sec&gt; Multifunctional device is powerful for promoting the development of a new generation electromagnetic systems, and metasurface has attracted much attention in this field due to its flexible control amplitude, phase, polarization wave. &lt;/sec&gt; It very important achieve different arbitrary phase distributions left-handed right-handed circularly polarized waves designing lenses. Here, strategy propagating geometrical simultaneously independently proposed by using gap-loaded...

In the field of clock generators, injection-locked generators have stronger performance than traditional phase-locked loop generators. However, generator lacks theoretical research that can guide actual circuit design. This hinders development and application injection paper establishes a model factor β based on LC oscillator, which measure factors affect injection-locking design generator.