GSM-R superconducting radio frequency front-end high-temperature superconducting filter

GSM-R superconducting radio frequency front-end high-temperature superconducting filter

  • CN 107,369,868 B
  • Filed: 05/11/2016
  • Issued: 11/03/2020
  • Est. Priority Date: 05/11/2016
  • Status: Active Grant
First Claim
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1. The GSM-R superconducting radio frequency front-end high-temperature superconducting filter is characterized by being applied to a GSM-R private network base station of a Chinese railway, and adopting a high-temperature superconducting thin film material, wherein the order of the GSM-R superconducting radio frequency front-end high-temperature superconducting filter is 6-20 orders, the circuit structure of the GSM-R superconducting radio frequency front-end high-temperature superconducting filter comprises a plurality of parallel loops for simulating oscillator distribution parameters and transmission lines for simulating coupling coefficients among oscillators, each section of the transmission lines are sequentially connected in series, the transmission line at the initial end and the transmission line at the tail end are respectively connected with ports for simulating source impedance and load impedance, nodes between adjacent transmission lines are connected with one parallel loop, and the parallel loop is formed by connecting a resistor, an inductor and a capacitor in parallel;

  • the micro-strip structure of the GSM-R superconducting radio frequency front-end high-temperature superconducting filter comprises a plurality of vibrators which are arranged in a comb shape at a certain interval, the micro-strip line is bent to form the vibrators, the high-temperature superconducting thin film material is MgO or LaAlO3, the working frequency band is 885-889 MHz, the relative bandwidth is 4.5 per mill, the in-band insertion loss is less than or equal to 0.3dB, the inhibition at the position with 5MHz is more than or equal to 60dB, when the high-temperature superconducting thin film material adopts the MgO, the length of the corresponding single vibrator ranges from 14mm to 17mm, the width of the single vibrator ranges from 2mm to 3mm, the distance range of the adjacent vibrators ranges from 0.5mm to 2.5mm, the line width range of the microstrip line of the single vibrator ranges from 0.1mm to 0.5mm, the line distance range of the microstrip line of the single vibrator ranges from 0.1mm to 0.5mm, when the high-temperature superconducting thin film material adopts the MgO, the thickness of the GSM-R superconducting radio frequency front-end high-temperature superconducting filter is 0.47 mm-0.53 mm.

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