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In this paper, it introduces some new developments of several new LTCC microwave stereo integrated circuits, including: X-band ultra wideband balun, ultra wideband 3dB orthogonal directional couple, a new bandpass filter with highly steep band, ultra-wideband and palanar magtic T, bandpass filter with double transmission zeros, quintuple-mode dual-band filter, ultra broadband vivaldi antenna with...
In this paper studies an X-band ultra-wideband micro-balun based on LTCC, the working frequency of 7–13GHz, belonging to the X-band, the relative bandwidth is 60%. In this paper, from the design and manufacture of the product, combined with the theoretical basis, through the HFSS simulation software to complete the design, finally, it decided to use three coupling lines to improved Marchand Balun...
In this paper, an ultra-wideband stripline 3dB orthogonal directional coupler based on LTCC is studied. The operating frequency is 0.5–3.5GHz and the relative bandwidth is 150%. The difficulty lies in the requirements of ultra-wideband, high performance and miniaturization. In this paper, we started from the design and manufacture of the product, combined with the theoretical basis, through the HFSS...
This paper introduces the research results of the GaAs ultra-wideband MMIC control circuit technology, including: ultra-wideband digital phase shifter, digital attenuator, absorption type switch, reflective switch and vector modulator. The research results of three-dimensional integrated circuit technology based on LTCC are also proposed in this paper, including a variety of LTCC bandpass filters,...
Due to the low frequency and long wavelength of the filter, miniaturization has become a huge difficulty. The cut-off frequency of low-pass filter is 1000MHz, it belongs to the UHF. To achieve high performance on the basis of miniaturization, it is created by a structure of resonant units by LTCC technology. Using the circuit simulation and 3D simulation software to optimize and simulate, the measured...
It is very important for filter's performance to improve the stop-band rejection. To achieve high performance, cross coupling to add transmission zeros and technology of cascaded filter are considered. This filter is created by using LTCC technology. Using the circuit simulation and 3D simulation software to optimize and simulate, the measured results of the filter match well with the electromagnetic...
In this paper, a multi-stage LTCC bandpass filter with an good performance is proposed, which composes of six resonators. Two transmission zeros were realized by cross-coupling to achieve good stop-band attenuation. The filter is implemented based on the theory of the tapped combline filter, 3-D EM simulation technology, and design of experiment (DOE) method. It presents a small size, high frequency...
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