This study proposes a three-order dielectric filter design method using the CST 3D electromagnetic simulation software package. The transmission zero is generated by a cascade three-section (CT) cross-coupling structure between the source and second resonator, or load and third resonator to achieve high suppression require ments at higher frequencies. The second and third resonators’ open-end electrodes are connected to form a three-or der filter structure to achieve low loss performance. The short-circuit end of the four resonators is shortened to ex pand the electrode debugging area to simplify filter debugging complexity. The integrated dielectric filter sample was fabricated using ceramic material with a dielectric constant of 45.99, and subsequently tested. The proposed dielec tric filter had a 1 dB bandwidth of 117 MHz in the 2 084-2 104 MHz passband frequency range. The insertion loss (IL) was less than 1.2 dB, and the passband standing wave ratio was less than 1.28. The attenuation was 34.35 dB at a higher frequency of 2.2 GHz and 31.04 dB at a lower frequency of 1.6 GHz, and the size was 10.41 mm× 3.7 mm×4.57 mm. Finally, it was confirmed that the test results were in good agreement with the simulation results.