A small antenna using an SRR structure in a wireless communication system includes: a first radiation unit positioned over a dielectric substrate formed of a predetermined dielectric medium and having a predetermined ring shape; a feed unit positioned over the dielectric substrate and configured to feed a signal to the first radiation unit; a second radiation unit positioned under the dielectric substrate and having a predetermined ring shape; a via formed through the dielectric substrate to connect the first and second radiation units; a ground unit positioned under the dielectric substrate and configured to ground the first and second radiation units; and a metal line unit positioned under the dielectric substrate to connect the second radiation unit and the ground unit. The feed unit includes first and second capacitors which accomplish impedance matching when the signal is fed to the first radiation unit.

Small antenna using SRR structure in wireless communication system and method for manufacturing the same

The invention relates to a unit-type dual-band infrared detection assembly suitable for a low-temperature environment. The unit-type dual-band infrared detection assembly mainly serves as a photovoltaic conversion sensor at the front end of a signal chain, and is especially suitable for the analysis and application field of broadband infrared spectrum under the low-temperature environment, wherein the low-temperature environment is an environment, where the temperature is lower than 80 K, preferably, 60 K-80 K; and the broadband, in the example, is 2.5-13.3 [mu]m infrared wavelength. A Dewar cavity is utilized to enable a color separation film to be packaged with two types of unit-type detectors, thereby effectively solving the problem of broadband coverage hard to be realized by single type of detector Dewar package; the detection assembly can combine a refrigerating machine to realize work under the low-temperature environment; and a pre-amplification circuit is integrated in the assembly in the form of a chip module, so that system noise can be further suppressed, and a voltage signal can be output directly.

Unit-type dual-band infrared detection assembly suitable for low-temperature environment

The invention relates to a multi-frequency band ultra wideband microstrip antenna, which comprises a dielectric layer, wherein a radiation patch and a microstrip feeder line connected with the radiation patch are arranged at one side of the dielectric layer; a grounding plate is arranged at the other side of the dielectric layer; the radiation patch comprises a middle radiation arm and L-shaped radiation arms arranged at the left and right sides of the middle radiation arm; the middle radiation arm comprises a rectangular patch and a rectangular ring in mutual connection; the L-shaped radiation arms comprises a transverse arm and a longitudinal arm; each of the middle radiation arm and the two L-shaped radiation arms generates resonant frequency; the lower side edge of the transverse arm of the L-shaped radiation arm at the right side and the upper side edge of the grounding plate are coincident; the lower side edge of the transverse arm of the L-shaped radiation arm at the left side is coincident with the upper side edge of the transverse arm of the L-shaped radiation arm at the right side.

Multi-frequency band ultra wideband microstrip antenna

An integrated active antenna is provided to receive signals of dual frequency band at the same time by parallel connecting an open stub to an ending point of a feeding line of a planar monopole antenna. A dielectric substrate(10) has a first surface and a second surface. The first surface is faced with the second surface. An antenna(20) is formed on the first surface of the dielectric substrate. A first ground surface(30) and a second ground surface(32) are formed in both sides of a feeding line of the antenna. A via hole(40) electrically connects the first surface and the second surface of the dielectric substrate. A first signal output part and a second signal output part are formed on the second surface of the dielectric substrate. The first signal output part amplifies a first signal having a first center frequency among signals provided from the antenna. The second signal output part amplifies a second signal having a second center frequency among signals provided from the antenna. Input terminals of the first signal output part and the second signal output part are connected to the feeding line of the antenna through the via hole.

Kim Joon Il

Papers

Integrated active antenna