The invention discloses an ISM frequency band microstrip array antenna with a negative permeability material and a manufacturing method thereof. The ISM frequency band microstrip array antenna comprises a first dielectric substrate, a second dielectric substrate and an SMA coaxial joint. An air cavity is arranged between the first dielectric substrate and the second dielectric substrate. The center of the first dielectric substrate is hollow, and the upper surface of the periphery of the hollow center is provided with a split-ring resonator array. The upper surface of the second dielectric substrate is provided with a microstrip feed line, a plurality of U-shaped groove microstrip antennas and a feed network. The plurality of U-shaped groove microstrip antennas are connected with one end of the feed network, and the other end of the feed network is connected with the SMA coaxial joint through a microstrip feed line. The lower surface of the second dielectric substrate is provided witha metal grounding plate. A negative permeability material is formed by periodically arranging split-ring resonators, so that a time-varying magnetic field of electromagnetic waves radiated from two sides is suppressed, the half-power beam width of far-field radiation is effectively reduced, and the gain of forward radiation is improved; a plurality of resonance points are generated by using the U-shaped groove microstrip antenna, and the plurality of resonance points are connected to realize a broadband; and the bandwidth and the gain of the microstrip array antenna can be effectively improved.

ISM frequency band microstrip array antenna with negative permeability material and manufacturing method

The invention discloses a 24GHz miniaturized radar antenna, and belongs to the field of microwave radio frequency. A 24GHz miniaturized radar antenna comprises a top dielectric substrate, a middle dielectric substrate and a bottom dielectric substrate which are sequentially stacked from top to bottom. A top metal radiation patch is arranged on the upper surface of the top dielectric substrate, andthe cross section of the top metal radiation patch is rectangular. An intermediate layer metal radiation patch is arranged on the upper surface of the intermediate layer dielectric substrate, and theshape of the intermediate layer metal radiation patch is a first-order Minkowski fractal graph obtained by taking a rectangle as an outline and taking a proportionality coefficient as k. A bottom metal radiation patch is arranged on the upper surface of the bottom dielectric substrate, and the shape of the bottom metal radiation patch is a second-order Minkowski fractal graph obtained by taking arectangle as an outline and taking a proportionality coefficient as k. The lower surface of the bottom dielectric substrate is provided with a grounding plate. According to the invention, the problemthat the cost is increased while the miniaturization of the existing automobile radar is realized is solved.

24GHz miniaturized radar antenna

The invention discloses a 24GHz automobile anti-collision radar antenna, and belongs to the field of microstrip antennas. According to the 24GHz automobile anti-collision radar antenna, an air cavityis formed between an upper dielectric substrate and a lower dielectric substrate, a radiation patch is arranged in the center of the upper surface of the upper dielectric substrate, a grounding plateis arranged on the upper surface of the lower dielectric substrate, and a cross-shaped through groove with the center of the grounding plate as the center is formed in the grounding plate. The manufacturing method of the radiation patch comprises the following steps: taking a square as a basic pattern, a fractal proportionality coefficient k being 0.5, and obtaining the shape of a first-order patch through first-order Mikowski fractal; and cutting off a right angle at the right angle of the square and two right angles closest to the right angle from the first-order patch, the cutting points being located on two sides of the right angle, and forming an annular through groove by taking the center of the square as the center of a circle to obtain the radiation patch. The 24GHz automobile anti-collision radar antenna disclosed by the invention is used as an automobile anti-collision radar antenna, so that the ranging accuracy is improved.

24GHz automobile anti-collision radar antenna

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ISM frequency band microstrip array antenna with negative permeability material and manufacturing method

24GHz miniaturized radar antenna

24GHz automobile anti-collision radar antenna