39results about How to "Reduce the size of the antenna" patented technology

The structure of antenna includes a grounding component, a first send receive component, and a second send receive component. The first send receive component includes a first L shaped component, and a first radiation sect. The first L shaped component is connected to the grounding component. The first radiation sect is connected to the first L shaped component. The first send receive component is in use for sending and receiving the first radio signal. The second send receive component includes a second L shaped component, and a second radiation sect. The second L shaped component is connected to the grounding component. The second radiation sect is connected to the second L shaped component. The second send receive component is in use for sending and receiving the second radio signal. Position of the second radiation sect is between the first radiation sect and the grounding component approximately.

The invention discloses a multi-port frequency-division tunable antenna which comprises a reflection plate and a feed network module, wherein the feed network module comprises a phase shifter module, a frequency divider array and a power divider, the frequency divider array is connected with the phase shifter module, the power divider is connected with the phase shifter module, the back side of the reflection plate is connected with the frequency divider array, the front side of the reflection plate is provided with a wideband dipole array through a non-conductive mode, and the wideband dipole array comprises dipole units. In the antenna, through the design of the phase shifter module and the power divider matched with the frequency divider array, a signal of a wideband radiator or the antenna is divided into two paths or even multiple paths of independent sub signals so as to form two pairs or even multiple pairs of antennas with different frequency bands; on the condition of no increase of the antenna volume, at least one pair of antenna is equivalently added; and on the premise of ensuring performance, approximate half of the antenna volume is reduced, and space resources of a base station are greatly saved.

The invention relates to an antenna oscillator assembly, an antenna and a piece of communication equipment. The oscillator assembly comprises a cross sector intersecting oscillator, a support feed assembly, a ground plate and a polarization isolation power dividing device. The cross sector intersecting oscillator is fixed on the top of the support feed assembly. The bottom of the support feed assembly is fixed on the center of the ground plate. The polarization isolation power dividing device is arranged on the central position of the ground plate back side. The cross sector intersecting oscillator is connected with the polarization isolation power dividing device through a coaxial supply line inside the support feed assembly. The antenna oscillator assembly which is no longer dependent on microwave dielectric plates solves the multi-frequency wideband circular polarization feed problem. Meanwhile, by forming the cross sector intersecting oscillator and adjusting the height of the cross sector intersecting oscillator away from the ground plate, the antenna oscillator assembly achieves more flexible directional diagram control and optimized circular polarization characteristics. By means of the polarization isolation power dividing device, the antenna oscillator assembly can make de-rotation multipath signals suppressed. The antenna oscillator assembly which has the characteristics of wideband, low consumption and high efficiency can make the volume, the weight and the cost of the antenna obviously reduced.

The invention provides a microwave optical signal wireless laser transmission device and method, and belongs to the technical field of microwave optical signal transmission. The problem that in the prior art, microwave optical signal long-distance wireless laser transmission cannot be conducted between two platforms moving relatively is solved. The device comprises a first tracking unit, a secondtracking unit, an alignment unit, a signal transmitting optical fiber and a signal receiving optical fiber, wherein the first tracking unit is connected with the second tracking unit, the second tracking unit is connected with the alignment unit, the signal transmitting optical fiber is connected with the second tracking unit, the alignment unit is connected with the signal receiving optical fiber, and an optical antenna is arranged in the first tracking unit. The device and method are mainly used for long-distance wireless laser transmission of microwave optical signals.

The invention discloses a low-interference unit of a base station antenna. Thelow-interference unit comprises a base, a microstrip support PCB is arranged on the base, a vibrator arm extending horizontally is arranged at the upper end of the microstrip support PCB, and a choke sleeve is arranged on the vibrator arm. By adopting the choke sleeve design, the emission of high-frequency signals can bereduced, the problem of large mutual interference of high and low frequencies is solved, and the size of the antenna is correspondingly reduced without influencing the working effect.

The invention discloses a multichannel small broadband receiver, which comprises a signal processor, a small broadband antenna group and a broadband radio frequency receiving front end group, whereinthe broadband radio frequency receiving front end group is positioned between the small broadband antenna group and the signal processor; the small broadband antennas in the small broadband antenna group are connected with the broadband radio frequency receiving front ends in the broadband radio frequency receiving front end group in a one-to-one correspondence manner; the small broadband antennagroup is used for receiving broadband microwave signals in a space; the broadband radio frequency receiving front end group amplifies, filters and down-mixes the broadband microwave signal into an intermediate frequency signal and sends the intermediate frequency signal to the signal processor; and the signal processor is used for carrying out analog-to-digital conversion on the intermediate frequency signal, converting the intermediate frequency signal into a digital signal and then carrying out digital signal processing. Under the condition that the function is not changed, the size of a conventional system can be greatly reduced.

The invention discloses a flaky polarized antenna, comprising a reflecting plate and an outer cover. Particularly, the reflecting plate is made of a PCB (Printed Circuit Board); an upper vibrator and a lower vibrator made of microstrip lines and having plate structures are arranged on the reflecting plate, and the upper vibrator and the lower vibrator are respectively located on two sides of the reflecting plate and spaced from each other; the reflecting plate is further provided with a connecting through hole, and a connecting block made of metal is arranged in the connecting through hole; one end of the connecting block is directly connected with the upper vibrator, and the other end is connected with the lower vibrator by a connecting strip made of metal. The flaky polarized antenna has the advantages of simple structure, small size, wide band and the like.

The invention provides a radiation element and an antenna. The radiation element is formed by a square board through N-ORDER FRACTAL, wherein N is an integer and is greater than or equal to 3. First hollow grooves are separately formed in the middle parts of four edges of the square board towards the center of the square board. Second hollow grooves are separately formed in the middle parts of the four edges of each first order square towards the center of the first order square. Fractal of a structure formed after the second order fractal is continued to form the N-ORDER FRACTAL according to a second order fractal method. The radiation element provided by the invention has the advantage of small area at the same operating frequency.

The disclosure provides an antenna device including an antenna element, a feeding portion, a filtering circuit, and a sensing circuit. The antenna element transmits or receives a radiation signal, wherein the radiation signal includes at least one of a first component and a second component, and a frequency band of the first component is lower than a frequency band of the second component. The feeding portion is coupled to the antenna element. The filtering circuit is coupled to the feeding portion, receives the radiation signal via the feeding portion and filters the second component of the radiation signal to generate a sensing signal. The sensing circuit is coupled to the filtering circuit, receives the sensing signal and determines whether a human body approaches the antenna device based on the sensing signal.

The invention relates to a near-field communication antenna. The near-field communication antenna is used for performing near-field communication. The near-field communication antenna includes a grounding part, radiation parts, short-circuit parts and a feed-in part; the grounding part is located at a first plane of a substrate; a plane where the radiation parts is located is parallel to the first plane; the radiation parts include a first radiation part and a second radiation part; one ends of each of short-circuit parts are connected with the grounding part, and the other ends of the short-circuit parts are connected with the radiation parts; the short-circuit parts are used for adjusting the resonance frequency of the near-field communication antenna so that the size of the near-field communication antenna can be decreased; the feed-in part is connected with the radiation parts and is used for feeding in electromagnetic wave signals; and a gap is formed between the first radiation part and the second radiation part, so that the intensity of an electric field in the area of the first radiation part and the second radiation part can be enhanced. The intensity of the near-field electric field of the near-field communication antenna is high, and the size of the antenna is small, and the antenna is suitable for the design of thin and small products.