摘要:
An antenna structure includes a connection portion. A feed portion connecting to the connection portion defines a feed point thereon. An inductance portion extends from the connection portion, and a free end of the inductance portion connects to a ground end. A capacitance portion that is in a long narrow strip shape extends from the connection portion and is parallel with and adjacent to the ground end. And radiating portions connect to the connection portion respectively. The antenna structure employs the inductance portion, the capacitance portion and the ground end to simulate a LC parallel connection to substitute for an inductor and a capacitor. Therefore, the antenna structure achieves an aim of adjusting a resonance frequency and an impedance matching without the inductor and the capacitor, simplifying the design of the antenna structure, decreasing the manufacture cost and attaining a good performance.
摘要:
A dual-band antenna has a grounding portion, two ends of which extend substantially perpendicular to the grounding portion towards a same side to form a first fixing portion and a second fixing portion. An antenna unit extends towards the first fixing portion from the second fixing portion. The antenna unit includes a basic portion spaced from the grounding portion, a feeding point positioned at the basic portion, and a first and second radiating portion extending towards the first fixing portion from the basic portion side by side to space from each other. The first radiating portion extends beyond the second radiating portion. A coupling portion extends towards the second fixing portion from the first fixing portion along a substantially longitudinal centerline of the second radiating portion, with a free end thereof away from the second radiating portion and beyond a free end of the first radiating portion to define a space therebetween.
摘要:
A multi-band antenna has a first radiating conductor defining a first side connected to a feeding conductor and a short portion, and a second side opposite to the first side and connected to a second radiating conductor, a third radiating conductor and a fourth radiating conductor. The second radiating conductor is arranged between the third radiating conductor and the fourth radiating conductor. The length of the first radiating conductor and the second radiating conductor resonates at a first frequency range and a second frequency range which is double frequency higher than the first frequency range. The length of the first radiating conductor and the third radiating conductor resonates at a third frequency range which is higher than and close to the second frequency range. The dimension of the fourth radiating conductor has an effect on antenna characteristics in the third frequency range.
摘要:
A dual-band antenna has a first meandering portion, a second meandering portion and a connection portion defining two ends. The first meandering portion and the second meandering portion have different length. One end of the first meandering portion connects one end of the second meandering portion. The other end of the first meandering portion connects one end of the connection portion. The other end of the second meandering portion connects a feeding portion. The other end of the connection portion connects a ground portion. The feeding portion, the second meandering portion, the first meandering portion and the connection portion obtain an electrical resonance corresponding to a first frequency range. The second meandering portion obtains an electrical resonance corresponding to a second frequency range.
摘要:
A multi-band antenna adapted to a portable electrical device capable of operating in various wireless communication bands includes a first radiating conductor having opposite elongated sides, a second radiating conductor extending from one end of the first radiating conductor, a third radiating conductor arranging about a central area of the first radiating. Both the second radiating conductor and the third radiating conductor extend from the same elongated side of the first radiating conductor. A feeding body is curved and extended from the third radiating conductor. According to a position that the feeding body connecting to the third radiating conductor and designed the feeding body, operation of the multi-band antenna has a preferred range of a low frequency bandwidth and a high frequency harmonic bandwidth.
摘要:
A dual-band antenna has a ground portion, a connection portion with a feeding point separated from the ground portion and a short portion connected to the ground portion and the connection portion. The short portion and the ground portion are formed an acute angle therebetween. The connection portion respectively connect a first radiating portion and a second radiating portion. The first radiating portion and the second radiating portion are parallel to said ground portion. The short portion is arranged between the ground portion and the first radiating portion. When the dual-band antenna operates at wireless operation, the connection portion, the first radiating portion and the second radiating portion resonate to obtain a first frequency range and a second frequency range. The short portion is formed as a function of an inductance.
摘要:
The present invention discloses a multi-band antenna, the multi-band antenna has an antenna base, a power feed portion and a grounding point. The antenna base includes a first rectangular portion, a second rectangular portion and a third rectangular portion. A first connection portion connects the first rectangular portion with the second rectangular portion, a second connection portion connects the first extending portion with the second extending portion. The power feed portion is arranged below the antenna base, and the power feed portion connects to the first rectangular portion and the second rectangular portion. The grounding point is arranged below the first rectangular portion and near the power feed portion. The first and second connection portions control the size of the electric current through the antenna base. By the above-mention unique design, the multi-band antenna can receive and transmit the signals of the different frequency bands and has a smaller volume.
摘要:
A loop-slot antenna defined by a conductive plate includes a first slot and a second slot. The first slot and the second slot divide the conductive plate into a first strip, a second strip and a patch element. The first slot is an L-shaped slot and includes a transverse slot section extending along the lower edge of the conductive plate and a longitudinal slot section extending along the left edge of the conductive plate and opening to the upper edge of the conductive plate. The first slot is operated at a first frequency. The first strip includes a transverse branch and a longitudinal branch that has a feed point. The second slot opens upward. The second strip has a free end on which a grounding point is disposed. The patch element is formed between the first and the second slots and operable at a second frequency.
摘要:
The present invention provides a pharmaceutical composition for treating skin disorders, including enhancing the healing of wounds for diabetic patients. Specifically, this invention relates to the use of the extracts of Plectranthus amboinicus and Centella asiatica for improving skin disorders, including enhancing the healing of wounds for diabetic patients, and a pharmaceutical composition comprising the extracts of Plectranthus amboinicus and Centella asiatica as well as a wound dressing comprising the same. The invention also provides a method for preparing the crude extract and extract of Plectranthus amboinicus.