Miniaturized Tunable Phase Shifter using a Periodically Loaded Ridged Half-Mode Substrate Integrated Waveguide

Investigation and Implementation of Integrated SIW System for Hexagonal Diamond of Lamda Shape Slots Fractal Array Antenna for X and KU-Band Applications

“…One of these techniques is by using SIW transmission structures with a number of embedded metallic via as a cylindrical inductive post in a specific position of the structure. The inductive posts are equivalent to a network of high pass filter [31][32][33][34]. The equivalent circuit of two metal posts expressed as T-network with two reactance's 𝑗𝑋 and susceptance 𝑗𝐵.The values of equivalent circuit depend on and vary with both the diameter and position of metal posts in the SIW transmission structure.…”

“…The equivalent circuit of two metal posts expressed as T-network with two reactance's 𝑗𝑋 and susceptance 𝑗𝐵.The values of equivalent circuit depend on and vary with both the diameter and position of metal posts in the SIW transmission structure. To obtain a phase advance in phase shifter systems, a high pass filter may be used as the switched high-pass/low-pass [34][35][36][37]. The phase shift 𝜑, of the high-pass filter expressed in ( 11) [26] indicate the dependence of the phase shift on the diameter and position of the embedded metallic via.…”

“…Another technique is using a row of metallic via in the SIW line to change the phase of the incident wave by means of changing their position in substrate dielectric of SIW structure [30][31][32][33][34][35][36][37]. The main structure and implemented view of the SIW phase shifter is shown in figure 5 (a), its dimensions tabulated in table 4 and Figure 5 (c) shows the scattering parameters of the SIW phase shifter and from the results it is found that the transmission coefficient is about -0.1 dB with reflection coefficient less than -10 to -50 dB over most of the frequency band from 6-13 GHz especially at 11 GHz.…”

Continuously tunable 360° phase shifter based on planar waveguide technology for MM‐wave applications

“…The structure is complex, costly and consumes considerable power. Furthermore, the maximum phase shift of this phase shifter is at the DC power consumption is about 4.8 W. Tunable periodically loaded ridged half‐mode SIW phase shifter using variable capacitors with maximum phase shift range of 102. is reported in [4]. In order to increase the phase shift range, a tunable reflective type SIW phase shifter using varactor diodes is proposed in [5].…”

“…Introduction: Over the past decades, various phase shifters based on substrate integrated waveguide (SIW) have been implemented in different technologies such as liquid crystal (LC), ferrite low-temperature co-fired ceramic (LTCC) and varactor diodes as a tuning component to provide continues phase shift [1][2][3][4][5][6][7]. In [2] by partially replacing the dielectric substrate of SIW with LC and embedding an electric bias structure, an electronically tunable phase shifter is developed.…”