Symmetrical coplanar waveguide with finite ground plane

Abstract

A symmetrical coplanar waveguide with finite ground plane (SCPW) has been analyzed. The symmetrical configuration is obtained by simply placing a dielectric substrate above a conventional finite ground plane coplanar waveguide (FCPW). The conformal mapping method is used to calculate the quasistatic effective permittivity ϵeff and characteristic impedance Z0. The SCPW has a larger ϵeff and a smaller Z0, compared with the conventional FCPW. This configuration should be useful for the design of balanced mixer circuits and for applications to the design of balanced feed lines in printed antennas. © 1993 John Wiley & sons, Inc.

Quasistatic TEM characteristics of overlayed supported asymmetric coplanar waveguides

“…As can be seen, the presence of the overlaying material increases the values of the effective dielectric constant while it decreases the value of the characteristic impedance. In addition, the curves d in Figure 4b for SR = 1 are also the same as the overlayed CPW results presented by Chai et al [8]. Figure 4c shows that the quasistatic TEM parameters of OSACPW are changed due to the supporting substrate, but the effect of the supporting layer on the quasistatic TEM parameters is less than that of overlaying material, as mentioned previously.…”

“…These results are the same as those of ACPW given elsewhere [6,7]. Moreover, the curves d in Figure 4a for SR = 1 are overlapping with those of the open CPW [2,8]. The quasistatic parameters of the overlayed ACPW as a function of the shape factor w / G and the spacing ratio SR are shown in Figure 4b.…”

“…(15) and (20), the variation of the effective dielectric constant and the characteristic impedance of OSACPW, as well as those for the symmetric overlayed CPW [8] and the open ACPW [6,7] when the relative dielectric constants crZ and cr3 are equal to 1.…”

Compact CPW-Based Zeroth-Order Resonant Antenna With Interleaving CRLH Unit Cells

“…This configuration can effectively reduce the antenna footprint. The characteristic impedance of the CPW with a finite ground width can be calculated [16]. The selected length of the CRLH unit cell is 14.8 mm because the CRLH unit cell must be shorter than a quarter wavelength of the operating frequency to satisfy the homogeneity condition [15].…”

The Effect of Dielectric Height and Ground Plane Width on Multilayer MCM FGCPW Lumped Elements

“…So, an optimum 3D system-in-package (SIP) architecture will incorporate thin film microstrip (TFMS), coplanar waveguide (CPW), and substrate integrated waveguide (SIW) side-by-side in a multilayer substrate. The use of finite-ground coplanar waveguide (FGCPW) [1][2][3] is essential to make the MCM compact and suitable for high frequency applications. Compact and high quality lumped elements are one of the most critical requirements for a MCM.…”