A low-cost continuous flow parallel memory-based FFT processor for Ultra-Wideband (UWB) applications

2008 ◽  
Author(s):  
Chin-Long Wey ◽  
Shin-Yo Lin ◽  
Hsu-Sheng Wang ◽  
Chun-Ming Huang
Keyword(s):  
Continuous Flow ◽  
Low Cost ◽  
Ultra Wideband ◽  
Parallel Memory ◽  
Fft Processor ◽  
Uwb Applications

A Low-Cost Continuous-Flow Parallel Memory-Based FFT Processor for UWB Applications

2011 ◽  
Vol E94-A (1) ◽  
pp. 315-323 ◽  
Author(s):  
Chin-Long WEY ◽  
Shin-Yo LIN ◽  
Hsu-Sheng WANG ◽  
Hung-Lieh CHEN ◽  
Chun-Ming HUANG
Keyword(s):  
Continuous Flow ◽  
Low Cost ◽  
Parallel Memory ◽  
Fft Processor ◽  
Uwb Applications

A Low-Cost Continuous-Flow FFT Processor for UWB Applications

2008 ◽  
Author(s):  
Chin-Long Wey ◽  
Shin-Yo Lin ◽  
Hsu-Sheng Wang ◽  
Chun-Ming Huang
Keyword(s):  
Continuous Flow ◽  
Low Cost ◽  
Fft Processor ◽  
Uwb Applications

scholarly journals Compact Enhanced CPW-Fed Antenna for UWB Applications

2021 ◽  
Vol 10 (1) ◽  
pp. 15-20
Author(s):  
H. Abdi ◽  
J. Nourinia ◽  
C. Ghobadi
Keyword(s):  
Low Cost ◽  
Impedance Matching ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Compact Antenna ◽  
Low Profile ◽  
Rectangular Slit ◽  
Operating Bandwidth ◽  
Uwb Applications ◽  
Operational Range

This paper presents a compact antenna with co-planar waveguide (CPW) feed line for ultra-wideband (UWB) applications. The proposed antenna consists of a beveled radiating patch with wide rectangular slit at its upper side and a partial ground plane with insertion of symmetrically two-step beveled tapers at its center and sides, which provides a wide operating bandwidth. The antenna is integrated with narrow rectangular-shaped parasitic elements with different lengths placed adjacent to radiant patch to significantly enhance the impedance matching and bandwidth, especially at the upper frequencies. The measured results show an |S11| less than -10 dB bandwidth of 2.5-19.8 GHz with 155% fractional bandwidth. Simulation results are in good agreement with experimental measurements, which exhibits the validity of the proposed design approach. Moreover, the proposed CPW-fed antenna shows omnidirectional radiation patterns with stable gain within the operational range. The proposed compact antenna with low profile, light weight, large frequency bandwidth, ease of fabrication and low cost material is suitable for UWB applications.

scholarly journals A Novel Address Scheme for Continuous-Flow Parallel Memory-Based Real-Valued FFT Processor

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1042 ◽  
Author(s):  
Min Yuan ◽  
Zhenguo Ma ◽  
Feng Yu ◽  
Qianjian Xing
Keyword(s):  
Fourier Transform ◽  
Parallel Processing ◽  
Continuous Flow ◽  
State Of The Art ◽  
Signal Flow Graph ◽  
Normal Order ◽  
Variable Size ◽  
Flow Graph ◽  
Parallel Memory ◽  
Fft Processor

In this article, we present a modified constant-geometry based signal flow graph for memory-based real-valued fast Fourier transform architecture. Without an extra permutation, the corresponding address scheme solves the memory conflict and achieves continuous-flow operation with the minimal memory and computation cycles requirement when compared to the state-of-the-art designs. Besides, the address scheme meets the constraint of in-place operation, concurrent I/O, normal-order I/O, variable size, and parallel processing. The experimental results demonstrate the resource and frequency efficiency of the proposed address scheme.

scholarly journals Design and Implementation of Quad-Port MIMO Antenna with Dual-Band Elimination Characteristics for Ultra-Wideband Applications

2020 ◽  
Vol 10 (5) ◽  
pp. 1715
Author(s):  
Pawan Kumar ◽  
Shabana Urooj ◽  
Fadwa Alrowais
Keyword(s):  
Low Cost ◽  
Multiple Input Multiple Output ◽  
Dielectric Substrate ◽  
Split Ring Resonator ◽  
Ultra Wideband ◽  
Dual Band ◽  
Mimo Antenna ◽  
Complementary Split Ring Resonator ◽  
Input Multiple Output ◽  
Uwb Applications

A planar, microstrip line-fed, quad-port, multiple-input-multiple-output (MIMO) antenna with dual-band rejection features is proposed for ultra-wideband (UWB) applications. The proposed MIMO antenna design consists of four identical octagonal-shaped radiating elements, which are placed orthogonally to each other. The dual-band rejection property (3.5 GHz and 5.5 GHz corresponding to Wi-MAX and WLAN bands) was obtained by introducing a hexagonal-shaped complementary split-ring resonator (HCSRR) in the radiators of the designed antenna. The MIMO antenna was etched on low-cost FR-4 dielectric substrate of size 58 × 58 × 0.8 mm3. Isolation higher than 18 dB and envelope correlation coefficient (ECC) lesser than 0.07 was observed for the MIMO/diversity antenna in the operating range of 3–16 GHz. The presented four-port UWB MIMO antenna configuration was fabricated, and the experimental results validate the simulation outcomes.

scholarly journals A Local Oscillator Phase Compensation Technique for Ultra-Wideband Stepped-Frequency Continuous Wave Radar Based on a Low-Cost Software-Defined Radio

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 780
Author(s):  
Kazunori Takahashi ◽  
Takashi Miwa
Keyword(s):  
Software Defined Radio ◽  
Initial Phase ◽  
Continuous Wave ◽  
Low Cost ◽  
Local Oscillator ◽  
The Other ◽  
Ultra Wideband ◽  
Single Frequency ◽  
Wave Radar ◽  
Stepped Frequency

The paper discusses a way to configure a stepped-frequency continuous wave (SFCW) radar using a low-cost software-defined radio (SDR). The most of high-end SDRs offer multiple transmitter (TX) and receiver (RX) channels, one of which can be used as the reference channel for compensating the initial phases of TX and RX local oscillator (LO) signals. It is same as how commercial vector network analyzers (VNAs) compensate for the LO initial phase. These SDRs can thus acquire phase-coherent in-phase and quadrature (I/Q) data without additional components and an SFCW radar can be easily configured. On the other hand, low-cost SDRs typically have only one transmitter and receiver. Therefore, the LO initial phase has to be compensated and the phases of the received I/Q signals have to be retrieved, preferably without employing an additional receiver and components to retain the system low-cost and simple. The present paper illustrates that the difference between the phases of TX and RX LO signals varies when the LO frequency is changed because of the timing of the commencement of the mixing. The paper then proposes a technique to compensate for the LO initial phases using the internal RF loopback of the transceiver chip and to reconstruct a pulse, which requires two streaming: one for the device under test (DUT) channel and the other for the internal RF loopback channel. The effect of the LO initial phase and the proposed method for the compensation are demonstrated by experiments at a single frequency and sweeping frequency, respectively. The results show that the proposed method can compensate for the LO initial phases and ultra-wideband (UWB) pulses can be reconstructed correctly from the data sampled by a low-cost SDR.

Design of a compact UWB antenna with a partial ground plane on epoxy woven glass material

2017 ◽  
Vol 24 (1) ◽  
pp. 73-79
Author(s):  
Md. Moinul Islam ◽  
Mohammad Tariqul Islam ◽  
Mohammad Rashed Iqbal Faruque ◽  
Rabah W. Aldhaheri ◽  
Md. Samsuzzaman
Keyword(s):  
Dielectric Material ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Design Parameters ◽  
Uwb Antenna ◽  
Glass Material ◽  
Measurement Results ◽  
Good Term ◽  
Parametric Analyses ◽  
Uwb Applications

AbstractA compact ultra-wideband (UWB) antenna is presented in this paper with a partial ground plane on epoxy woven glass material. The study is discussed to comprehend the effects of various design parameters with explicit parametric analyses. The overall antenna dimension is 0.22×0.26×0.016 λ. A prototype is made on epoxide woven glass fabric dielectric material of 1.6 mm thickness. The measured results point out that the reported antenna belongs to a wide bandwidth comprehending from 3 GHz to more than 11 GHz with VSWR<2. It has a peak gain of 5.52 dBi, where 3.98 dBi is the average gain. Nearly omnidirectional radiation patterns are observed within the operating frequency bands. A good term exists between simulation and measurement results, which lead the reported antenna to be an appropriate candidate for UWB applications.

scholarly journals Compact Liquid Crystal Based Tunable Band-Stop Filter with an Ultra-Wide Stopband by Using Wave Interference Technique

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Longzhu Cai ◽  
Huan Xu ◽  
Daping Chu
Keyword(s):  
Liquid Crystal ◽  
Impedance Matching ◽  
Wide Frequency Range ◽  
Ultra Wideband ◽  
New Wave ◽  
Wave Interference ◽  
Rejection Level ◽  
Band Stop Filter ◽  
The Individual ◽  
Uwb Applications

A wave interference filtering section that consists of three stubs of different lengths, each with an individual stopband of its own central frequency, is reported here for the design of band-stop filters (BSFs) with ultra-wide and sharp stopbands as well as large attenuation characteristics. The superposition of the individual stopbands provides the coverage over an ultra-wide frequency range. Equations and guidelines are presented for the application of a new wave interference technique to adjust the rejection level and width of its stopband. Based on that, an electrically tunable ultra-wide stopband BSF using a liquid crystal (LC) material for ultra-wideband (UWB) applications is designed. Careful treatment of the bent stubs, including impedance matching of the main microstrip line and bent stubs together with that of the SMA connectors and impedance adaptors, was carried out for the compactness and minimum insertion and reflection losses. The experimental results of the fabricated device agree very well with that of the simulation. The centre rejection frequency as measured can be tuned between 4.434 and 4.814 GHz when a biased voltage of 0–20 Vrms is used. The 3 dB and 25 dB stopband bandwidths were 4.86 GHz and 2.51 GHz, respectively, which are larger than that of other recently reported LC based tunable BSFs.

Sign in / Sign up

Export Citation Format

Share Document