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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...
In this paper, a new angular super-resolution technique called Phase Weighting Super-resolution Method (PWSM) based on Hadamard matrix is proposed, which is used in conventional phased array radar for improving angle resolution. The phase shifting necessary to steer the main beam of the aperture coupled micro-strip antenna is achieved by 0-π MEMS phase shifters, which are integrated in a hybrid fashion...
This paper presents the design and simulation result of a miniaturized millimeter-wave bandpass filter realized by low temperature co-fired ceramic (LTCC) technology. The bandpass filter with a central frequency of 60 GHz and a 6 GHz pass-band is designed as a three-dimensional (3-D) structure based on distributed components. A distinct feature of this filter is the smaller size and lower in sertion...
In this paper, a phased array of aperture coupled microstrip antenna with a 0-π phase shifter is demonstrated. The phase shifting necessary to steer the main beam of the antenna of the aperture is achieved by 0-π phase shifter, which are integrated in a hybrid fashion between the antenna and feed network. The design of RF-MEMS phase shifters is presented and validated by very good measurement results.
A bandpass filter based on low-temperature co-fired ceramic (LTCC) multilayered technology with high-order harmonic suppression is presented. By using multilayer coupled stripline resonator structure, utilizing several methods such as increasing loaded capacitance, introducing defected ground structure (DGS), series resonator to ground and tuning Z shape coupling stub, the high-order harmonics was...
An ultra-wideband (2-18GHz) 6-bit MMIC digital attenuator has been designed. The attenuator has been fabricated with 0.5μm GaAs PHEMT process. Low insertion phase shift has been achieved over the main attenuation states. On-wafer measurement results of the developed MMIC chips in the 2-18GHz band show that the 6-bit MMIC digital attenuator has 31.5dB dynamic range stepped by 0.5dB; attenuation accuracy:...
This paper presents the results of an antenna switch module integrating a switch (SP9T) and two low-pass filters for harmonic rejection on a low temperature co-fired ceramic (LTCC) substrate. This contributes not only to reduce the size and weight, but also to shorten the development term of RF circuit and simplify the assembly process. It will be used for GSM/UMTS dual mode cellular phones. The 50-ohm...
In this paper, the design of miniaturized low-pass filter in a Low Temperature Co-fired Ceramic(LTCC) Technology is presented. The pass-band of the low-pass filter is from 900MHz to 1450MHz. The capacitor is constructed by multilayer MIM(Mental-Insulator-Mental) capacitor, and the inductor is fabricated by a narrow metal transmission line. The VSWR of input and output port is less than 1.6. The whole...
A miniaturized and high stopband rejection bandpass filter (BPF) with three finite transmission zeros is presented in this paper. The BPF with a central frequency of 3.2 GHz and 200 MHz bandwidth is implemented in a novel distributed stripline configuration using LTCC (low-temperature-cofired ceramic) technology. A distinct feature of this filter is excellent out-of-band attenuation performance. The...
This letter outlines the design and manufacture of a UHF-band miniaturized band-pass filter realized by low-temperature cofired ceramic (LTCC) technology for super heterodyne microwave receiver applications. A distinct feature of this filter is the smaller size than conventional filter at such a low frequency and steady pass-band temperature electrical performance compared with surface acoustic wave...
A low-temperature-cofired ceramic (LTCC) bandpass filter with low insertion loss and high image rejection is presented for super heterodyne microwave receiver within 6.5-7.1 GHz band. By improving the filter cell structure, two transmission zeros can be generated to achieve wide-band image suppression from cascading filter cells. The presented method provides the design flexibility of locating these...
This paper presented a design and simulation result of a miniaturized complementary diplexer realized by low-temperature co-fired ceramic (LTCC) technology. The diplexer consisted of two pass-bands, a central frequency of 1.175 GHz with bandwidth of 46.8% and a central frequency of 1.925 GHz with bandwidth of 28.6% respectively. In the presented structure, we used transmission lines to realize the...
A miniaturized and high stopband rejection bandpass filter (BPF) with three finite transmission zeros is presented in this paper. The BPF with a central frequency of 3.4 GHz and 200 MHz bandwidth is implemented in a novel distributed stripline configuration using LTCC (low-temperature-cofired ceramic) technology. A distinct feature of this filter is excellent out-of-band attenuation performance. The...
This paper presents a new compact 90deg hybrid coupler using multi-layer technology. In order to reduce an intrinsic circuit area of the hybrid coupler, a compact meandered line configuration and a new multi-layer structure design have been adopted. The configuration and structural dimensions of the multi-layer structure were designed and investigated through detailed 3-D electro-magnetic simulations...
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