scholarly journals Design of a continuously tunable reflectarray element for 5G metrology in the k-band

2020 ◽  
Vol 18 ◽  
pp. 1-5
Author(s):  
Thomas Harz ◽  
Thomas Kleine-Ostmann ◽  
Thorsten Schrader
Keyword(s):  
High Frequency ◽  
Printed Circuit Board ◽  
Simulation Software ◽  
Circuit Board ◽  
Control Voltage ◽  
Wave Excitation ◽  
Varactor Diode ◽  
Printed Circuit ◽  
Commercial Off The Shelf ◽  
K Band

Abstract. We introduce a new tunable reflectarray element for an operation frequency of 26 GHz in the k-band. It is shown that a 340∘ continuous tunning range of the reflected wave can be accomplished by using an aperture-coupled patch antenna with only one single varactor diode. The simplified design and the small needed space make it usable for k-band reflectarrays with many elements. The functionality of the reflectarray element is explained and the crucial parts are analyzed. The approach to get a full phase shift is discussed in detail. A bias-T is developed to provide the control voltage to the varactor diode without interfering with the high frequency path. The high frequency path and the DC-path are decoupled by 39 dB using a bias-T. A commercial off-the-shelf varactor diode is selected and its functionality at 26 GHz is verified. Therefore, a test printed circuit board with through, reflect, line standards is developed to de-embed the varactor diode and to evaluate it with a vector network analyzer. The reflectarray is simulated in a unit cell with plane wave excitation and periodic boundary condition using the simulation software package CST Microwave Studio™.

A Design of Printed Inverted-F Antenna for RFID Tag at 5.8 GHz

2013 ◽  
Vol 427-429 ◽  
pp. 1293-1296
Author(s):  
Yan Zhong Yu ◽  
Ji Zhen Ni ◽  
Xian Hui Li
Keyword(s):  
High Frequency ◽  
Printed Circuit Board ◽  
Ground Plane ◽  
Simulation Software ◽  
Circuit Board ◽  
Electromagnetic Simulation ◽  
Antenna Structure ◽  
Rfid Tag ◽  
Printed Circuit ◽  
Substrate Layer

A printed inverted-F antenna for RFID tag at 5.8 GHz is designed in this paper. The antenna structure consists of an inverted-F patch, a substrate layer, and a ground plane. To reduce costs, the FR4 is selected as the material of substrate layer, which is used commonly in PCB (Printed Circuit Board). Its relative permittivity is 4.4 and a loss tangent is 0.02. The inverted-F patch and ground plane are laid on/under the substrate layer respectively. The designed antenna is modeled, simulated and optimized by using HFSS (high frequency electromagnetic simulation software). Simulation results demonstrate that the printed inverted-F antenna can satisfy the requirements of RFID Tag applications.

Integration of a K-Band Receiver Front-End Using a Copper Core Printed Circuit Board

2018 ◽  
Vol 2018 (1) ◽  
pp. 000384-000388
Author(s):  
Brian Curran ◽  
Jacob Reyes ◽  
Christian Tschoban ◽  
Ivan Ndip ◽  
Klaus-Dieter Lang ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Antenna Arrays ◽  
High Frequency ◽  
Printed Circuit Board ◽  
Cost Effective ◽  
Circuit Board ◽  
Front End ◽  
High Bandwidth ◽  
Increasing Demand ◽  
K Band

Abstract Increasing demand for high bandwidth wireless satellite connections and telecommunications has resulted in interest in steerable antenna arrays in the GHz frequency range. These applications require cost-effective integration technologies for high frequency and high power integrated circuits (ICs) using GaAs, for example. In this paper, an integration platform is proposed, that enables GaAs ICs to be directly placed on a copper core inside cavities of a high frequency laminate for optimal cooling purposes. The platform is used to integrate a K-Band receiver front-end, composed of four GaAs ICs, with linear IF output power for input powers above −40dBm and a temperature of 42°C during operation.

scholarly journals NotchPUF: Printed Circuit Board PUF Based on Microstrip Notch Filter

Cryptography ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 11
Author(s):  
Mitchell Martin ◽  
Jim Plusquellic
Keyword(s):  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Statistical Tests ◽  
Notch Filter ◽  
Circuit Board ◽  
Circuit Boards ◽  
Printed Circuit ◽  
In Series ◽  
Commercial Off The Shelf ◽  
Using Data

Physical Unclonable Functions (PUFs) are primitives that are designed to leverage naturally occurring variations to produce a random bitstring. Current PUF designs are typically implemented in silicon or utilize variations found in commercial off-the-shelf (COTS) parts. Because of this, existing designs are insufficient for the authentication of Printed Circuit Boards (PCBs). In this paper, we propose a novel PUF design that leverages board variations in a manufactured PCB to generate unique and stable IDs for each PCB. In particular, a single copper trace is used as a source of randomness for bitstring generation. The trace connects three notch filter structures in series, each of which is designed to reject specific but separate frequencies. The bitstrings generated using data measured from a set of PCBs are analyzed using statistical tests to illustrate that high levels of uniqueness and randomness are achievable.

A K-band delay line based on parasitic reduced artificial left-handed transmission line

2013 ◽  
Vol 5 (6) ◽  
pp. 709-711
Author(s):  
Hyun-Seung Lee ◽  
Eun-Gyu Lee ◽  
Choul-Young Kim
Keyword(s):  
Transmission Line ◽  
Return Loss ◽  
Printed Circuit Board ◽  
Delay Line ◽  
Circuit Board ◽  
Printed Circuit ◽  
Left Handed ◽  
24 Ghz ◽  
K Band ◽  
Interdigital Capacitors

A K-band microstrip delay line based on parasitic reduced left-handed transmission line (LHTL) with interdigital capacitors and shunt inductors is demonstrated with the aid of printed circuit board technology. The proposed delay line has ground slots under the interdigital capacitors to reduce the parasitic capacitance. The time delay of the proposed LHTLs is approximately 2.6 times larger than that of the conventional LHTLs. The input return loss of the proposed LHTL at 24 GHz is −16.9 dB and less than −10 dB from 20.5 to 26.1 GHz.

A Novel Low Cost Package for Radio Frequency Applications

2013 ◽  
Vol 135 (2) ◽  
Author(s):  
Sandeep Chaturvedi ◽  
Shiban K. Koul
Keyword(s):  
High Frequency ◽  
Printed Circuit Board ◽  
Low Cost ◽  
Cost Effective ◽  
Circuit Board ◽  
Test Results ◽  
Printed Circuit ◽  
Pcb Manufacturing ◽  
Manufacturing Techniques ◽  
Commercial Applications

Design, fabrication, and test results of a novel 3-layer RF package using a commonly available high frequency laminate are presented in this paper. The developed package can be manufactured using standard multilayer printed circuit board (PCB) manufacturing techniques making it cost effective for commercial applications. The package exhibits excellent RF characteristics up to 6 GHz.

scholarly journals Instrumenting Polyodon spathula (Paddlefish) Rostra in Flowing Water with Strain Gages and Accelerometers

Biosensors ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 37
Author(s):  
Clayton R. Thurmer ◽  
Reena R. Patel ◽  
Guilermo A. Riveros ◽  
Quincy G. Alexander ◽  
Jason D. Ray ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Strain Gages ◽  
Physical Force ◽  
Printed Circuit ◽  
The North ◽  
In Vivo Experiments ◽  
In Vivo Testing ◽  
Commercial Off The Shelf

The prominent rostrum of the North American Paddlefish, supported by a lattice-like endoskeleton, is highly durable, making it an important candidate for bio-inspiration studies. Energy dissipation and load-bearing capacity of the structure from extreme physical force has been demonstrated superior to that of man-made systems, but response to continuous hydraulic forces is unknown and requires special instrumentation for in vivo testing on a live fish. A single supply strain gage amplifier circuit has been combined with a digital three-axis accelerometer, implemented in a printed circuit board (PCB), and integrated with the commercial-off-the-shelf Adafruit Feather M0 datalogger with a microSD card. The device is battery powered and enclosed in silicon before attachment around the rostrum with a silicon strap "watch band." As proof-of-concept, we tested the instrumentation on an amputated Paddlefish rostrum in a water-filled swim tunnel and successfully obtained interpretable data. Results indicate that this design could work on live swimming fish in future in vivo experiments.

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