Printed circuit board material and design considerations for wireless applications

2002 ◽  
Author(s):  
B. Daigle
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Wireless Applications ◽  
Printed Circuit ◽  
Design Considerations ◽  
Board Material

scholarly journals Wideband Rectangular Foldable and Non-foldable Antenna for Internet of Things Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Steve W. Y. Mung ◽  
Cheuk Yin Cheung ◽  
Ka Ming Wu ◽  
Joseph S. M. Yuen
Keyword(s):  
Internet Of Things ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Design Parameters ◽  
Multiple Frequency ◽  
Wireless Applications ◽  
Printed Circuit ◽  
Iot Applications ◽  
Trade Offs ◽  
The Cost

This article presents a simple wideband rectangular antenna in foldable and non-foldable (printed circuit board (PCB)) structures for Internet of Things (IoT) applications. Both are simple structures with two similar rectangular metal planes which cover multiple frequency bands such as GPS, WCDMA/LTE, and 2.4 GHz industrial, scientific, and medical (ISM) bands. This wideband antenna is suitable to integrate into the short- and long-range wireless applications such as the short-range 2.4 GHz ISM band and standard cellular bands. This lowers the overall size of the product as well as the cost in the applications. In this article, the configuration and operation principle are presented as well as its trade-offs on the design parameters. Simulated and experimental results of foldable and non-foldable (PCB) structures show that the antenna is suited for IoT applications.

Estimation Of Complex Permittivity Of Printed Circuit Board Material Using Waveguide Measurements

1996 ◽  
Vol 430 ◽  
Author(s):  
C. J. Reddy ◽  
M. D. Deshpande ◽  
G. A. Hanidu
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Complex Permittivity ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
The Finite Element Method ◽  
Printed Circuit ◽  
X Band ◽  
Board Material ◽  
Raphson Method

AbstractA simple waveguide measurement technique is presented to determine the complex permittivity of printed circuit board material. The printed circuit board with metal coating removed from both sides and cut into size which is the same as the cross section of the waveguide is loaded in a short X-band rectangular waveguide. Using a network analyzer, the reflection coefficient of the shorted waveguide(loaded with the sample) is measured. Using the Finite Element Method(FEM) the exact reflection coefficient of the shorted wavguide(loaded with the sample) is determined as a function of dielectric constant. Matching the measured value of the reflection coefficient with the reflection value calculated using FEM and utilizing Newton-Raphson Method, an estimate of the dielectric constant of a printed circuit board material is obtained. A comparison of estimated values of permittivity constant obtained using the present approach with the available data.

In situ Decapsulation of Plastic Encapsulated Devices Mounted to a Printed Circuit Board

2002 ◽  
Author(s):  
Ronald R. Hylton
Keyword(s):  
Printed Circuit Board ◽  
Failure Mechanisms ◽  
Circuit Board ◽  
Printed Circuit ◽  
Board Material

Abstract In situ decapsulation of plastic devices can be used to avoid the removal or alteration of failure mechanisms caused by exposure to desoldering temperatures. This paper describes techniques to decapsulate devices mounted to a printed circuit board using materials that are readily available and easily customized to specific applications. The techniques are extended to the decapsulation of other packaging technologies, such as SBGA packages and chip-on-board assemblies. Finally, post decapsulation cleaning techniques that will not harm the printed circuit board material are presented.

Filler effect of low loss dielectricity in printed circuit board material

2007 ◽  
Vol 23 (2-4) ◽  
pp. 141-145 ◽  
Author(s):  
Jiae Lee ◽  
Hyosoon Shin ◽  
Jonghee Kim ◽  
Hogyu Yoon
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Low Loss ◽  
Printed Circuit ◽  
Board Material
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