Low temperature cofired ceramic (LTCC) ridge waveguide bandpass filters

Stripline Transition to Ridge Waveguide Bandpass Filters

“…The first is the prototype synthesis to get the required impedance inverters [7,8] for the inner sections of the filter and to realize the required input/output coupling. A modification factor [4] is introduced to modify the fractional bandwidth of the synthesized filter that turns out to be wider than the desired bandwidth due to dispersion effects and large bandwidth that are not considered in [7]. Fig.…”

“…Ridge waveguide filters also have low loss, high spurious performance and compact size. The design of ridge waveguide filters suitable for multilayers applications can be found in [3][4][5]. Fig.…”

“…Transitions from the single ridge waveguide at the input and the output to the stripline as shown in Fig. 1(b) [4] is needed to make the filter compatible with other components in multilayers packages. Very good results were obtained for filters designed according to the configuration in Fig.…”

Design of Multi-Passband Bandpass Filters With Low-Temperature Co-Fired Ceramic Technology

“…The frequency-selective resonators [3][4][5][6], stepped-impedance resonators [7,8] and coupled resonator pairs [9] are also employed to design dual-passband filters. In this article, we use low-temperature co-fired ceramic [10][11][12][13][14][15] technology to implement the three-dimensional (3D) multi-passband bandpass filters. Figure 1 shows the architecture of the proposed multi-passband bandpass filter, which is composed of multi-sectional shortcircuit transmission lines and connected transmission lines.…”

Sensitivity analysis of the scattering parameters of microwave filters using the adjoint network method

“…For some technologies, it is possible to tune the manufactured filter to achieve the required response. In other technologies, for example, LTCC [1,2], tuning is not possible. Determining how sensitive a design is to tolerances is thus important in a comprehensive design procedure.…”