A Simple and Accurate Method for Extracting Super Wideband Electrical Properties of the Printed Circuit Board

Abstract

In order to accurately design microwave, millimeter-wave components and circuits, a simple and accurate method for extracting extremely wideband characteristics of the printed circuit board (PCB), including relative dielectric constant, dielectric loss tangent, and equivalent copper conductivity, is proposed and validated in this paper. By properly selecting wideband distribution of multiple TM mn0 modes in the designed circular substrate integrated waveguide (CSIW) cavities, extremely broadband properties of PCB can theoretically be extracted with only one pair of CSIW cavities. The proposed method overcomes the limitations of conventional methods that only support narrowband applications, require a large number of cavities, and have relatively large errors. The experiments show that the proposed method is able to extract, accurately and efficiently, 8-110 GHz characteristics of a TLY-5Z substrate-based PCB and the extracted results are verified by designing and measuring the fourth-order Chebyshev filter at X-band. INDEX TERMS Dielectric constant, dielectric loss tangent, equivalent conductivity, circular substrate integrated waveguide (CSIW) cavity, wideband characteristics.

Antenna Array Design Based on Low-Temperature Co-Fired Ceramics

“…To address these issues, the use of substrate-integrated waveguide (SIW) has gained popularity due to its low loss characteristics similar to metal waveguides and ease of integration similar to microstrip lines [9,10]. SIW is particularly well-suited for antenna feeding networks in high-frequency millimeter wave bands, and has been widely applied to various antennas in research papers in recent years.…”

“…Although antennas based on microstrip lines, like microstrip patch antennas, offer advantages such as low cost, small size, and easy integration, conventional feed networks based on microstrip lines suffer serious losses at discontinuities and curves in the millimeter wave band, leading to low radiation efficiency and high sidelobe levels [ 6 , 7 , 8 ]. To address these issues, the use of substrate-integrated waveguide (SIW) has gained popularity due to its low loss characteristics similar to metal waveguides and ease of integration similar to microstrip lines [ 9 , 10 ]. SIW is particularly well-suited for antenna feeding networks in high-frequency millimeter wave bands, and has been widely applied to various antennas in research papers in recent years.…”

Anisotropic Conductivity Measurements by Two Kinds of Multimode Rectangular Plate-Laminated Cavities

“…The resonator methods enable measurements of the conductivity by measuring the resonance characteristics. Various shapes of resonators have been used: rectangular cavities [13]- [15], circular cavities [16], [17], and circular dielectric resonators [18], [19]. The method can measure the conductivity This work is licensed under a Creative Commons Attribution 4.0 License.…”

“…For more information, see https://creativecommons.org/licenses/by/4.0/ directly, but none of the methods consider the anisotropic characteristics of the conductivity. Multimode metal cavities are also used for conductivity measurement [14]- [17], [20]- [22]; however, all of them treat the conductivity as isotropic. The nonflat walls could be considered as roughness effects as studied in [13]; however, uniform roughness is assumed and two orthogonal effective conductivities cannot be measured by the method in [13].…”