Multilayer chip-type triplexer

A multilayer chip-type triplexer, comprising:

• an antenna input port;
• four matching transmission lines including first, second, third and fourth matching transmission lines each having first and second terminals;
• and
• three band-pass filters at different frequencies including first, second and third band-pass filters each having an input port and an output port;
• wherein the input port of the first band-pass filter is electrically connected with the second terminal of the first matching transmission line, the input port of the second band-pass filter is electrically connected with the second terminal of the second matching transmission line, the input port of the third band-pass filter is electrically connected with the second terminal of the third matching transmission line, the first terminal of the third matching transmission line, the first terminal of the second matching transmission line, and the first terminal of the fourth matching transmission line are electrically connected together, and the first terminal of the first matching transmission line and the second terminal of the fourth matching transmission line are electrically connected with said antenna input port;
• and
• wherein said multilayer chip-type triplexer has a plural-layer structure comprising from top to bottom:
• a first layer having a primary surface plane formed with said antenna input port, the three output ports of said three band-pass filters, and said second, third and fourth matching transmission lines;
• a second layer having a primary surface plane;
• a third layer having a primary surface plane formed with a first metallic sheet;
• a fourth layer having a primary surface plane formed with a second metallic sheet;
• a fifth layer having a primary surface plane formed with third, fourth and fifth metallic sheets;
• a sixth layer having a primary surface plane formed with a sixth metallic sheet;
• a seventh layer having a primary surface plane formed with a seventh metallic sheet, an eighth metallic sheet, and said first matching transmission line;
• an eighth layer having a primary surface plane formed with ninth, tenth and eleventh metallic sheets;
• a ninth layer having a primary surface plane formed with twelfth, thirteenth, fourteenth and fifteenth metallic sheets;
• a tenth layer having a primary surface plane formed with sixteenth and seventeenth metallic sheets;
• an eleventh layer having a primary surface plane formed with eighteenth, nineteenth, and twentieth metallic sheets, said eighteenth metallic sheet having first and second parts;
• a twelfth layer having a primary surface plane formed with twenty-first, twenty-second and twenty-third metallic sheets, said twenty-third metallic sheet having first and second parts;
• a thirteenth layer having a primary surface plane formed with twenty-fourth and twenty-fifth metallic sheets, said twenty-fourth metallic sheet having first and second parts;
• a fourteenth layer having a primary surface plane formed with twenty-sixth and twenty-seventh metallic sheets, said twenty-sixth metallic sheet having first and second parts;
• a fifteenth layer having a primary surface plane formed with twenty-eighth and twenty-ninth metallic sheets;
• a sixteenth layer having a primary surface plane formed with a thirtieth metallic sheet;
• and
• a seventeenth layer having a primary surface plane formed with a thirty-first metallic sheet;
• wherein the second terminal of the first matching transmission line is electrically connected with the second part of said twenty-third metallic sheet, the first part of said twenty-third metallic sheet is electrically connected with said fifteenth metallic sheet, the first part of said twenty-sixth metallic sheet is electrically connected with said thirty-first metallic sheet, the second part of said twenty-sixth metallic sheet is electrically connected with the output port of said first band-pass filter, the second terminal of said second matching transmission line is electrically connected with said twenty-eighth metallic sheet, said thirtieth metallic sheet is electrically connected with the second part of said twenty-fourth metallic sheet, the first part of said twenty-fourth metallic sheet is electrically connected with said thirty-first metallic sheet, the first part of said eighteenth metallic sheet is electrically connected with said ninth metallic sheet, the second part of said eighteenth metallic sheet is electrically connected with said twelfth metallic sheet, said seventeenth metallic sheet is electrically connected with the output port of said second band-pass filter, the second terminal of said third matching transmission line is electrically connected with said thirteenth metallic sheet, said thirteenth metallic sheet is electrically connected with said twenty-second metallic sheet, said twenty-second metallic sheet is electrically connected with said twenty-seventh metallic sheet, said fourteenth metallic sheet is electrically connected with said fourth metallic sheet, said third metallic sheet is electrically connected with said seventh metallic sheet, said fourteenth metallic sheet is electrically connected with said nineteenth metallic sheet, said nineteenth metallic sheet is electrically connected with said seventeenth metallic sheet, said fourteenth metallic sheet is electrically connected with the output port of said third band-pass filter, and said first metallic sheet, said second metallic sheet, said fifth metallic sheet, said sixth metallic sheet, said ninth metallic sheet, said fifteenth metallic sheet, said seventeenth metallic sheet, said twentieth metallic sheet, said twenty-first metallic sheet, said twenty-fifth metallic sheet, said twenty-ninth metallic sheet, and said thirty-first metallic sheet are electrically connected to the ground.