Search

CN-224232903-U - KU wave band-pass waveguide filter

CN224232903UCN 224232903 UCN224232903 UCN 224232903UCN-224232903-U

Abstract

The utility model discloses a KU band-pass waveguide filter, which comprises a lower seat, an upper cover, an input end, an output end and an impedance converter, wherein the lower seat is internally provided with corrugated filtering grooves penetrating through two sides, the upper cover is buckled at the top of the lower seat and is fixed to enable the corrugated filtering grooves to surround to form a single filtering channel, the input end is arranged at one end of the filtering channel, the output end is arranged at the other end of the filtering channel and can enable the filtering channel to be communicated end to end under the action of the input end and the output end, the impedance converter is arranged at the input end of the filtering channel, and the impedance converter comprises right-angle bosses formed on one side wall of the lower seat, and the number of the right-angle bosses is at least two. According to the KU band-pass waveguide filter provided by the utility model, through the arrangement of the lower seat and the upper cover, a single filtering channel can be formed between the input end and the output end, and the state of the plane of the inner side of the upper cover is attached to the top of the lower seat for assembly, so that the filtering channel can be formed, and meanwhile, the whole volume can be reduced.

Inventors

  • ZHONG YAN
  • XIA CHANG
  • ZHENG YAN
  • LI QINBING

Assignees

  • 重庆幂天通讯设备制造有限责任公司

Dates

Publication Date
20260512
Application Date
20250717

Claims (10)

  1. 1. A KU-band bandpass waveguide filter, comprising: The lower seat (1) is internally provided with ripple filtering grooves (11) penetrating through two sides; The upper cover (2) is buckled at the top of the lower seat (1) and is fixed, so that the corrugated filtering groove (11) surrounds to form a single filtering channel (3); an input terminal (33) provided at one end of the filter channel (3); The output end (34) is arranged at the other end of the filtering channel (3), and the filtering channel (3) can be communicated end to end under the action of the input end (33) and the output end (34); an impedance transformer (4) arranged at an input (33) of the filter channel (3); The impedance transformer (4) comprises right-angle bosses (41) formed on one side wall of the lower seat (1), the number of the right-angle bosses (41) is at least two, and a plurality of the right-angle bosses (41) are arranged in the direction of the input end (33) towards the filtering channel (3) in a progressive mode.
  2. 2. KU-band bandpass waveguide filter according to claim 1, characterized in that the number of right-angled bosses (41) in the impedance transformer (4) is two.
  3. 3. KU-band bandpass waveguide filter according to claim 1, characterized in that the input end (33) is provided at the bottom of the lower seat (1) and the output end (34) is provided outside the lower seat (1).
  4. 4. KU-band bandpass waveguide filter according to claim 3, characterized in that the filter channel (3) comprises a filter cavity (31), a partition wall (32) being provided in the filter cavity (31).
  5. 5. KU-band bandpass waveguide filter according to claim 4, characterized in that the two ends of the filtering cavity (31) correspond to the input (33) and output (34), respectively.
  6. 6. KU-band bandpass waveguide filter according to claim 4, characterized in that the partition wall (32) is longitudinally distributed in the filtering cavity (31) with a height gap between its top and the upper cover (2).
  7. 7. The KU band-pass waveguide filter according to claim 5, characterized in that the partition walls (32) have a plurality of partition walls (32) with a width gap left therebetween, and filter chambers (35) are formed between adjacent partition walls (32) by the width gap.
  8. 8. KU-band bandpass waveguide filter according to claim 6, characterized in that the number of the partition walls (32) is six, and that five filter chambers (35) are formed by six partition walls (32).
  9. 9. The KU band-pass waveguide filter according to claim 6, wherein six of the partition walls (32) are divided into three groups, the three groups of partition walls (32) being an inner partition wall group (320), a middle partition wall group (321) and an outer partition wall group (322) in this order; Wherein the heights of the inner partition wall group (320), the middle partition wall group (321) and the outer partition wall group (322) are sequentially decreased, and the heights of the partition walls (32) in each group are the same.
  10. 10. KU-band bandpass waveguide filter according to claim 8, characterized in that the five filter chambers (35) increase in width sequentially from the middle outwards.

Description

KU wave band-pass waveguide filter Technical Field The utility model relates to the technical field of KU band bandpass waveguide filters, in particular to a KU band bandpass waveguide filter. Background The waveguide filter (waveguide filter) is a filter based on a waveguide transmission line, and the basic principle is that the transmission characteristic of the waveguide is utilized, and the filtering of signals is realized by arranging a plurality of structures such as metal plates, spiral lines and the like inside the waveguide. Compared with other filters, the waveguide filter has the advantages of good isolation performance, high power bearing capacity, reliability and the like. It is provided that a signal with a uniform power spectrum is input from one port, and after the signal has passed through the network, the power spectrum absorbed on the load of the other port is no longer uniform, i.e. the output of the network is frequency selective, which is a filter. The filter criteria include operating frequency, insertion difference, passband ripple, out-of-band rejection, etc. The filters can be classified into Low Pass Filters (LPF), high Pass Filters (HPF), band Pass Filters (BPF), band reject filters (BEF) according to frequency band division. Among them, the field of radio frequency antennas mainly employs Band Pass Filters (BPFs). 1. A High Pass Filter (HPF) allows high frequency signals to pass while suppressing low frequency signals. 2. A Low Pass Filter (LPF), which serves as a key component in signal processing, functions to allow low frequency signals to pass while blocking or attenuating high frequency signals. 3. The characteristics of a band-pass filter (BPF) are that the amplitude of the signal in its passband remains independent of frequency, while the output signal decays rapidly when the frequency is below fp1 or above fp 2. 4. The characteristics of the band-reject filter (BEF) are exactly opposite to those of the bandpass filter. In the frequency range of fp1 to fp2, the band-stop filter can effectively suppress the passage of signals, and is thus mainly used for suppressing signals in a specific frequency band. With the development of microwave communication technology, the requirements on microwave devices are increasing. How to reduce the volume and improve the frequency selectivity is two important aspects for the filter, and a KU band-pass waveguide filter is proposed for this purpose. Disclosure of utility model Based on the above, it is necessary to provide a KU band-pass waveguide filter, in which a conventional dual-channel filtering cavity is provided with a single filtering channel, so that the overall volume can be reduced while the actual filtering effect is satisfied, the insertion loss can be reduced, and the noise suppression is enhanced. In order to solve the technical problems, the utility model adopts the following technical scheme: A KU-band bandpass waveguide filter comprising: the lower seat is internally provided with ripple filtering grooves penetrating through two sides; The upper cover is buckled at the top of the lower seat and is fixed, so that the corrugated filtering groove surrounds to form a single filtering channel; The input end is arranged at one end of the filtering channel; The output end is arranged at the other end of the filtering channel and can enable the filtering channel to be communicated end to end under the action of the input end and the output end; an impedance transformer arranged at the input end of the filtering channel; The impedance transformer comprises right-angle bosses formed on one side wall of the lower seat, wherein the number of the right-angle bosses is at least two, and the right-angle bosses are progressively arranged in the direction of the input end towards the filtering channel. Further, the number of right-angle bosses in the impedance transformer is two. Further, the input end is arranged at the bottom of the lower seat, and the output end is arranged at the outer side of the lower seat. Further, the filtering channel comprises a filtering cavity, and a partition wall is arranged in the filtering cavity. Further, two ends of the filtering cavity correspond to the input end and the output end respectively. Further, the partition walls are longitudinally distributed in the filtering cavity, and a height gap is reserved between the top of each partition wall and the upper cover. Further, the partition walls have a plurality of width gaps, and a filter chamber is formed between adjacent partition walls by the width gaps. Further, the number of the partition walls is six, and five filter chambers are formed in the six partition walls. Further, the six partition walls are divided into three groups, and the three groups of partition walls are an inner partition wall group, a middle partition wall group and an outer partition wall group in sequence; The heights of the inner partition wall group, the middle partition wall