CN112909561B - Waveguide monopulse frequency scanning antenna - Google Patents
Waveguide monopulse frequency scanning antenna Download PDFInfo
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- CN112909561B CN112909561B CN202011620963.3A CN202011620963A CN112909561B CN 112909561 B CN112909561 B CN 112909561B CN 202011620963 A CN202011620963 A CN 202011620963A CN 112909561 B CN112909561 B CN 112909561B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
Abstract
The invention relates to a waveguide single-pulse frequency scanning antenna. The antenna at least comprises a first antenna and a second antenna which are connected in sequence; a plurality of first gaps are formed in the side wall of the first antenna, and a plurality of second gaps are formed in the side wall of the second antenna; the first antenna is provided with a first communicating part which is arranged at the connecting end part of the first antenna and the second antenna, and the opening of the first communicating part corresponds to at least one first gap; and a second communicating part which is symmetrical to the first communicating part is arranged on the second antenna, and the opening of the second communicating part corresponds to at least one second gap. The invention adopts the tuning pin and introduces the tuning pin into the resonant cavity to reduce the volume of the resonant cavity, so that the space between the adjacent first gap and the second gap is ensured to be consistent with the space between the adjacent first gap and the adjacent second gap, the single pulse characteristic of the whole waveguide slot antenna is not influenced, the resonant state of the resonant cavity is adjusted, and the processing is easy to realize.
Description
Technical Field
The invention relates to the technical field of antenna coupling, in particular to a waveguide single-pulse frequency scanning antenna.
Background
The waveguide slot antenna consists of a number of half-wave slots open on a rectangular waveguide wall. The low-side lobe level switch has the advantages of convenient control of caliber distribution, easy realization of low-side lobe level, high efficiency, compact structure, simple and convenient processing and installation and the like. The waveguide slot antenna is a frequency-scanning antenna which changes the working frequency of the antenna to change the beam direction, and has outstanding advantages, but some problems still remain to be solved: usually, the target angle information is obtained, a plurality of pulse echo data are needed, and due to fluctuation of the target response to different frequencies, the pulse echo processing of a plurality of different frequencies can cause errors of target measurement. Therefore, the angle information can be accurately extracted by adding the single pulse function to the frequency scanning dimension. In order to realize the single pulse function, the waveguide slot antenna is divided into two sections, the near-field amplitude distribution of the whole waveguide slot array surface is changed by the first slot at the right-corner feed port of the second section and the last slot at the right-corner feed port of the first section, and the amplitude perturbation of the slot and the slot near field is adjusted. The impedance matching of the waveguide cannot be realized by using a transmission line matching mode due to the structure of the waveguide and the characteristics of electromagnetic energy transmission.
Generally, impedance matching is realized in a waveguide resonant cavity, and technologies such as stepped waveguide, gradual waveguide, right-angle waveguide changed into bent waveguide, right-angle waveguide changed into corner-cut bent waveguide, capacitive diaphragm, inductive diaphragm and the like are adopted. The existing waveguide impedance matching technology, such as the step waveguide, the gradual waveguide, the right-angle waveguide to the bend waveguide, the right-angle waveguide to the corner-cut waveguide, etc., needs to change the space of the waveguide resonant cavity greatly, which has great influence on the electric field intensity and the phase in the cavity, especially cannot ensure that the distance between the last slot of the first section and the first slot of the second section is equal to the distance between the slots of each waveguide slot antenna (which causes that two waveguide slot antennas cannot form a whole waveguide slot antenna), cannot realize excellent single pulse characteristics, and has complex process realization; if the technologies such as the capacitor diaphragm and the inductance diaphragm are adopted, the ignition phenomenon is easy to occur when the transmission power is large.
Therefore, there is a need to provide a new technical solution to improve one or more of the problems in the above solutions.
It is noted that this section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
It is an object of the present invention to provide a waveguide single-pulse frequency-swept antenna, which overcomes, at least to some extent, one or more of the problems due to the limitations and disadvantages of the related art.
According to a first aspect of the embodiments of the present invention, there is provided a waveguide single-pulse frequency-scanning antenna, which includes at least a first antenna and a second antenna connected in sequence;
a plurality of first gaps are formed in the side wall of the first antenna, and a plurality of second gaps are formed in the side wall of the second antenna;
the distances between the adjacent first gaps, between the adjacent second gaps and between the adjacent first gaps and the adjacent second gaps are equal;
the first antenna is provided with a first communicating part, the first communicating part is arranged at the connecting end part of the first antenna and the second antenna, and the opening of the first communicating part corresponds to at least one first gap;
a second communicating part which is symmetrical to the first communicating part is arranged on the second antenna, and an opening of the second communicating part corresponds to at least one second gap;
and a plurality of tuning pins are arranged in the first communicating part and the second communicating part respectively so as to reduce the volumes of the first communicating part and the second communicating part respectively through the tuning pins.
In an embodiment of the present invention, the first antenna includes a first waveguide, the second antenna includes a second waveguide, and the second waveguide has the same shape as the first waveguide and is a hollow rectangular shape.
In an embodiment of the present invention, the plurality of first slots are disposed on a rectangular sidewall of the first waveguide, and the plurality of second slots are disposed on a rectangular sidewall of the second waveguide.
In an embodiment of the present invention, the first communicating portion is disposed on a sidewall of the first waveguide opposite to the first slot, and is communicated with the first waveguide; the second communicating portion is provided on a side wall of the second waveguide opposite to the second slit, and communicates with the second waveguide.
In the embodiment of the invention, the first communicating cavity is provided with at least three tuning pins, the axes of the tuning pins are parallel to the plane of the first gap, and the second communicating cavity and the first communicating cavity are symmetrical about the connecting line of the first antenna and the second antenna.
In the embodiment of the invention, the cross section of the first communicating cavity is rectangular, the axis of the first communicating cavity is perpendicular to the axis of the first waveguide, and the width of the first communicating cavity is the same as the height of the first waveguide.
In the embodiment of the invention, the cross section of the second communicating cavity is rectangular, the axis of the second communicating cavity is perpendicular to the axis of the second waveguide, and the width of the second communicating cavity is the same as the height of the second waveguide.
In an embodiment of the present invention, the ratio of the length of the tuning pin located within the first communication cavity to the width of the first communication cavity is less than 1/2; the ratio of the length of the tuning pin located within the second communication chamber to the width of the second communication chamber is less than 1/2.
In the embodiment of the invention, three tuning pins are arranged in a triangular shape.
In an embodiment of the present invention, the first communicating portion corresponds to one of the first slits, and the second communicating portion corresponds to one of the second slits.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
in an embodiment of the present invention, according to the waveguide single-pulse frequency-scanning antenna provided in this embodiment, the first communicating portion and the second communicating portion are respectively disposed at the connecting end portion of the first antenna and the second antenna, and the tuning pins are respectively disposed at the first communicating portion and the second communicating portion, so as to reduce the volume in the resonant cavity, and make the distance between the adjacent first gap and the adjacent second gap equal to the distance between the adjacent first gap and the adjacent second gap, thereby not implementing a single-pulse characteristic for the waveguide gap antenna composed of the first antenna and the second antenna, adjusting the resonant state of the resonant cavity, and being easy to process; in addition, when the transmission power is large, the ignition phenomenon is not easy to occur.
Drawings
Fig. 1 shows a schematic structural diagram of a waveguide monopulse frequency-swept antenna in an exemplary embodiment of the invention;
FIG. 2 shows a schematic structural diagram of a tuning pin in an exemplary embodiment of the invention;
FIG. 3 is a schematic diagram illustrating structural parameters of an optimized tuning pin in an exemplary embodiment of the invention;
FIG. 4 illustrates a graph of model simulation computed standing waves in an exemplary embodiment of the invention;
FIG. 5 illustrates a standing wave diagram of the port before and after loading of the matching tuning pin by the waveguide slot antenna in an exemplary embodiment of the invention;
fig. 6 shows a near-field acquisition amplitude distribution diagram before and after loading a matching tuning pin on a waveguide slot antenna according to an exemplary embodiment of the present invention;
fig. 7 shows the center frequency point patterns before and after loading the matching tuning pin in the waveguide slot antenna according to the exemplary embodiment of the present invention.
In the figure: a first antenna 100; a second antenna 200; a first slit 101; a second slit 201; a first communicating portion 102; a second communicating portion 202; the tuning pin 103.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
In the present exemplary embodiment, first, a waveguide single-pulse frequency-scanning antenna is provided. Referring to fig. 1, the antenna includes at least a first antenna 100 and a second antenna 200 connected in sequence; a plurality of first slots 101 are formed in the side wall of the first antenna 100, and a plurality of second slots 201 are formed in the side wall of the second antenna 200; the distances between the adjacent first gaps 101, between the adjacent second gaps 201, and between the adjacent first gaps 101 and the adjacent second gaps 201 are equal; a first communicating portion 102 is disposed on the first antenna 100, the first communicating portion 102 is disposed at a connecting end portion of the first antenna 100 and the second antenna 200, and an opening of the first communicating portion 102 corresponds to at least one of the first slots 101; a second communicating portion 202 symmetrical to the first communicating portion 102 is provided in the second antenna 200, and an opening of the second communicating portion 202 corresponds to at least one second slit 201; a plurality of tuning pins 103 are provided in each of the first communicating portion 102 and the second communicating portion 202, so that the volumes of the first communicating portion 102 and the second communicating portion 202 are reduced by the plurality of tuning pins 103.
According to the waveguide single-pulse frequency scanning antenna provided by the embodiment, the first communicating part 102 and the second communicating part 202 are respectively arranged at the connecting end parts of the first antenna 100 and the second antenna 200, and the plurality of tuning pins 103 are respectively arranged at the first communicating part 102 and the second communicating part 202, so that the volume in the resonant cavity is reduced, the distance between the adjacent first gap 101 and the second gap 201 is equal to the distance between the adjacent first gap 101 and the adjacent second gap 201, the single-pulse characteristic of the waveguide gap antenna consisting of the first antenna 100 and the second antenna 200 is not realized, the resonant state of the resonant cavity is adjusted, and the processing is easy; in addition, when the transmission power is large, the ignition phenomenon is not easy to occur.
Next, the respective structures of the above-described waveguide single-pulse frequency scanning antenna in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 7.
In one embodiment, the first antenna 100 and the second antenna 200 have the same structure, and the first communicating portion 102 and the second communicating portion 202 have the same structure, but are symmetrically disposed, so that taking the first antenna 100 and the first communicating portion 102 as an example, the cavity of the first antenna 100 and the first communicating portion 102 form a resonant cavity, and according to the perturbation theory of the resonant cavity, the resonant state of the resonant cavity can be adjusted by introducing a pin at a position where an electric field or a magnetic field of the resonant cavity is stronger to reduce the volume of the resonant cavity, so as to adjust the perturbation of the radiation amplitude at the joint of the antennas at two ends. Specifically, the angle information can be accurately extracted by adding the single-pulse function in the frequency sweep, the waveguide slot antenna is divided into two sections for realizing the single-pulse function, namely, the first antenna 100 and the second antenna 200, and the first communicating portion 102 and the second communicating portion 202 are provided at the connecting end portions of the first antenna 100 and the second antenna 200, and the matching pins are inserted into the first communicating portion 102 corresponding to the last first slot 101 of the first antenna 100 and the second communicating portion 202 corresponding to the first second slot 201 of the second antenna 200, without affecting the radiated energy of the last first slot 101 of the first antenna 100 and the radiated energy of the first second slot 201 of the second antenna 200, the equivalent impedance characteristics of a plurality of pins at different positions in the waveguide port are utilized to realize matching of the feed port, so that the near-field acquisition amplitude distribution of the antenna radiation energy is approximate to a theoretical calculated value.
In addition, by applying the tuning pin 103 to the first communicating portion 102 of the first antenna 100 and the second communicating portion 202 of the second antenna 200, the tuning pin 103 adjusts the magnitude of the radiation field intensity of the first slot 101 corresponding to the first communicating portion 102 and the second slot 201 corresponding to the second communicating portion 202, so that the radiation energy at the first communicating portion 102 of the first antenna 100 is well connected with the radiation energy at the second communicating portion 202 of the second antenna 200, and the distance between the adjacent first slot 101 and second slot 201 is equal to the distance between the adjacent first slot 101 and the distance between the adjacent second slot 201, so as to avoid affecting the radiation characteristics of the whole antenna, thereby realizing the single pulse characteristic.
In addition, the tuning pins 103 with proper position and size at the first communicating part 102 and the second communicating part 202 can be optimized through HFSS simulation software, so that the continuous first antenna 100 and the continuous second antenna 200 are effectively jointed, the radiation characteristic is improved, and the waveguide impedance matching is effectively solved; the matching tuning pin 103 is loaded at the feed port of the waveguide slot antenna, the standing wave of the port is changed due to the frequency response of the waveguide, the effect of improving the amplitude distribution can be obviously seen by acquiring the amplitude in a near field, and the directional diagram is obviously calculated by an approximate theory.
In one embodiment, the first antenna 100 includes a first waveguide, and the second antenna 200 includes a second waveguide, which is the same shape as the first waveguide and is hollow and rectangular. Specifically, the waveguide is a structure for directionally guiding electromagnetic waves, that is, a device for transmitting electromagnetic waves in a microwave or visible light range, and generally refers to hollow metal waveguides having various shapes.
In one embodiment, the first slots 101 are disposed on the rectangular sidewall of the first waveguide, and the second slots 201 are disposed on the rectangular sidewall of the second waveguide. Specifically, the current distribution is formed on the inner wall of the waveguide, the slot antenna on the tube wall cuts a current line, the slots are excited to generate radiation outwards, and a waveguide slot antenna is formed, that is, a series of slots with the same size can be opened on the waveguide according to a certain rule to form a waveguide slot array, and in order to ensure that all the slots are excited in the same phase, the distance between every two adjacent slots should have the same value, which can be understood by referring to the prior art specifically, and is not described herein again.
In one embodiment, the first communicating portion 102 is disposed on a sidewall of the first waveguide opposite to the first slot 101, and communicates with the first waveguide; the second communicating portion 202 is provided on a side wall of the second waveguide facing the second slit 201, and communicates with the second waveguide. Specifically, the first communicating portion 102 is a rectangular structure, is perpendicular to the first antenna 100, is communicated with the hollow first waveguide structure of the first antenna 100, and is disposed on the side wall opposite to the first gap 101, that is, the opening of the first communicating portion 102 is opposite to the first gap 101, and similarly, the second communicating portion 202 is disposed in the same manner as the first communicating portion 102. The arrangement is easy to process, and the waveguide slot antenna (the first antenna 100 and the second antenna 200) is not influenced to realize the single-pulse characteristic.
In one embodiment, the first communicating cavity is provided with at least three tuning pins 103, the axes of the tuning pins 103 are parallel to the plane of the first slot 101, and the second communicating cavity and the first communicating cavity are symmetrical about the connecting line of the first antenna 100 and the second antenna 200. In one example, the first communicating cavity has a rectangular cross section, an axis of the first communicating cavity is perpendicular to an axis of the first waveguide, and a width of the first communicating cavity is the same as a height of the first waveguide. Specifically, the tuning pin 103 is applied to the first communicating portion 102 and the second communicating portion 202, and the first communicating portion 102 and the second communicating portion 202 have the same structure as the waveguide, so that the first communicating portion 102 and the second communicating portion 202 are replaced by the waveguide, as described below, for the TE10 type wave as the main mode in the rectangular waveguide, the electric field is strongest at the center of the wide wall of the waveguide, and the tuning pin has a significant influence on the near-field amplitude of the waveguide slot antenna, so that the aim of tuning reactance can be achieved, and matching can be achieved. Because one end of the pin and the other wide wall connected with the waveguide form a capacitor, and the pin rod extending into the waveguide has a certain distributed inductance, the pin can be equivalent to the form of an inductance-capacitance series circuit. Such an equivalent circuit is not constant and varies with the length of the inserted pin. When the length of the extension is shorter, the capacitance reactance presented by the extension is much larger than the inductance reactance, so that the series circuit is capacitive; when the extending length is increased and lengthened, the equivalent inductance and the capacitance are increased; if the length of the pin extending into the waveguide is increased to make the inductive reactance equal to the capacitive reactance, as shown in fig. 2, the inductance L and the capacitance C generate series resonance, so that the waveguide becomes a short circuit; the equivalent circuit becomes inductive as the length of the pin penetration continues to increase. But the capacity of the waveguide power is at this time significantly reduced by the pin being too short from the broad wall. In one example, the cross section of the second communication cavity is rectangular, the axis of the second communication cavity is perpendicular to the axis of the second waveguide, and the width of the second communication cavity is the same as the height of the second waveguide. The ratio of the length of the tuning pin 103 located within the first communication cavity to the width of the first communication cavity is less than 1/2; the ratio of the length of the tuning pin 103 located within the second communication chamber to the width of the second communication chamber is less than 1/2. In particular, to not reduce the power capacity of the waveguide too much, the length of the waveguide is typically less than 1/2, where the tuning pin 103 is primarily capacitive.
In one embodiment, three of the tuning pins 103 are arranged in a triangle. Specifically, in order to optimize the position of the tuning pin 103 for matching, thereby improving the amplitude characteristic, and tune the resonant cavity to reach the waveguide resonance state for impedance matching, the three tuning pins 103 may be arranged in a triangle, and the specific distance parameter may be set as shown in fig. 3.
In one embodiment, the first communicating portion 102 corresponds to one of the first slits 101, and the second communicating portion 202 corresponds to one of the second slits 201. Specifically, the arrangement does not affect the radiation energy of the last first slot 101 corresponding to the first communicating part 102 and the radiation energy of the first second slot 201 corresponding to the second communicating part 202, the feed ports are matched by using the equivalent impedance characteristics of the tuning pins 103 at different positions in the waveguide port, and the near-field collection amplitude distribution of the antenna radiation energy is approximate to a theoretical calculated value.
According to the waveguide single-pulse frequency scanning antenna provided by the embodiment, the first communicating part 102 and the second communicating part 202 are respectively arranged at the connecting end parts of the first antenna 100 and the second antenna 200, and the plurality of tuning pins 103 are respectively arranged at the first communicating part 102 and the second communicating part 202, so that the volume in the resonant cavity is reduced, the distance between the adjacent first gap 101 and the second gap 201 is equal to the distance between the adjacent first gap 101 and the adjacent second gap 201, the single-pulse characteristic of the waveguide gap antenna consisting of the first antenna 100 and the second antenna 200 is not realized, the resonant state of the resonant cavity is adjusted, and the processing is easy; in addition, when the transmission power is large, the ignition phenomenon is not easy to occur.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (10)
1. A waveguide monopulse frequency scanning antenna is characterized by at least comprising a first antenna and a second antenna which are sequentially connected:
a plurality of first gaps are formed in the side wall of the first antenna, and a plurality of second gaps are formed in the side wall of the second antenna;
the distances between the adjacent first gaps, between the adjacent second gaps and between the adjacent first gaps and the adjacent second gaps are equal;
the first antenna is provided with a first communicating part, the first communicating part is arranged at the connecting end part of the first antenna and the second antenna, and the opening of the first communicating part corresponds to at least one first gap;
a second communicating part which is symmetrical to the first communicating part is arranged on the second antenna, and the opening of the second communicating part corresponds to at least one second gap;
and a plurality of tuning pins are arranged in the first communicating part and the second communicating part respectively, so that the volumes of the first communicating part and the second communicating part are reduced by the tuning pins respectively.
2. The waveguide single-pulse frequency-scanning antenna according to claim 1, wherein the first antenna comprises a first waveguide, the second antenna comprises a second waveguide, and the second waveguide is the same as the first waveguide in shape and is hollow and rectangular.
3. The waveguide single-pulse-frequency-scanning antenna according to claim 2, wherein a plurality of the first slots are disposed on the rectangular side wall of the first waveguide, and a plurality of the second slots are disposed on the rectangular side wall of the second waveguide.
4. The waveguide single-pulse frequency-scanning antenna according to claim 3, wherein the first communicating portion is provided on a side wall of the first waveguide opposite to the first slot and communicates with the first waveguide; the second communicating portion is provided on a side wall of the second waveguide opposite to the second slit, and communicates with the second waveguide.
5. The waveguide single-pulse frequency-scanning antenna according to claim 4, wherein the first communicating cavity is provided with at least three tuning pins, the axes of the tuning pins are parallel to the plane of the first gap, and the second communicating cavity and the first communicating cavity are symmetrical with respect to the connecting line of the first antenna and the second antenna.
6. The waveguide single-pulse frequency-scanning antenna according to claim 5, wherein the cross section of the first communicating cavity is rectangular, the axis of the first communicating cavity is perpendicular to the axis of the first waveguide, and the width of the first communicating cavity is the same as the height of the first waveguide.
7. The waveguide single-pulse frequency-scanning antenna according to claim 6, wherein the cross section of the second communicating cavity is rectangular, the axis of the second communicating cavity is perpendicular to the axis of the second waveguide, and the width of the second communicating cavity is the same as the height of the second waveguide.
8. The waveguide monopulse frequency-swept antenna of claim 7, wherein a ratio of a length of said tuning pin located within said first communication cavity to a width of said first communication cavity is less than 1/2; the ratio of the length of the tuning pin located within the second communication chamber to the width of the second communication chamber is less than 1/2.
9. The waveguide monopulse frequency-scanning antenna of claim 8, wherein three of said tuning pins are arranged in a triangular pattern.
10. The waveguide single-pulse frequency-scanning antenna according to claim 1, wherein the first communicating portion corresponds to one of the first slits, and the second communicating portion corresponds to one of the second slits.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102931492A (en) * | 2012-10-31 | 2013-02-13 | 北京遥测技术研究所 | Center-feed ridge waveguide slot antenna |
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| US3109174A (en) * | 1959-11-02 | 1963-10-29 | Hughes Aircraft Co | Antenna array |
| CN101752675B (en) * | 2008-12-16 | 2013-05-29 | 深圳富泰宏精密工业有限公司 | Double-frequency antenna and wireless communication device applying same |
| CN104518285A (en) * | 2013-09-27 | 2015-04-15 | 电子科技大学 | Ka-waveband cavity coupling feed circular polarized horn antenna |
| CN104767037B (en) * | 2015-04-10 | 2017-11-17 | 中国电子科技集团公司第三十八研究所 | A kind of wide angle electric scanning transmitting-receiving double antenna of compact type high-isolation Sidelobe |
| CN107634342B (en) * | 2017-08-29 | 2020-06-05 | 大连港森立达木材交易中心有限公司 | Bidirectional uniform irradiation antenna feeder system |
| CN109326893A (en) * | 2018-11-08 | 2019-02-12 | 陕西黄河集团有限公司 | A kind of micro-strip frequency scanning antenna |
| CN110311232A (en) * | 2019-07-26 | 2019-10-08 | 广州辰创科技发展有限公司 | A kind of design method and antenna of low section frequency scanning antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102931492A (en) * | 2012-10-31 | 2013-02-13 | 北京遥测技术研究所 | Center-feed ridge waveguide slot antenna |
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