Browsing by Author "Chen Fu-Chiarng"

Now showing 1 - 13 of 13

Coplanar antenna unit and coplanar antenna
(2012-05-08)
Chen Fu-Chiarng
;
Kao Cheng-Lung
The present invention is related to a coplanar antenna unit and a coplanar antenna. By utilizing the unique properties of meta-material to design 1-D balanced CRLH leaky-wave antenna. The antenna can be realized with the coplanar antenna unit consisting of MIM capacitor and grounded inductor. In this invention, all proposed elements are implemented by planar print circuit broad, so the full-space switched beam scanning antenna has shorter length of leaky-wave antenna and good radiation performance.
LEAKY-WAVE ANTENNA CAPABLE OF MULTI-PLANE SCANNING
(2011-06-23)
Chang Rong-Yuan
;
Chen Fu-Chiarng
A leaky-wave antenna capable of multi-plane scanning is provided. The leaky-wave antenna includes a substrate, a first antenna series, a second antenna series and a plurality of control units. The first antenna series intersects with the second antenna series to share a predetermined antenna unit among many antenna units. A part of the antenna units is connected in series to extend from a first and a second transmission lines of the predetermined antenna unit to compose the first antenna series, and the other antenna units are connected in series to extend from a third and a fourth transmission lines of the predetermined antenna unit to compose the second antenna series. The control units control the transmission paths between the first to the fourth transmission lines and the antenna units, and switch a leaky beam to different scanning planes, wherein the leaky beam scans with frequency variation through the antenna units.
Leaky-wave antenna capable of multi-plane scanning
(2012-08-28)
Chang Rong-Yuan
;
Chen Fu-Chiarng
A leaky-wave antenna capable of multi-plane scanning is provided. The leaky-wave antenna includes a substrate, a first antenna series, a second antenna series and a plurality of control units. The first antenna series intersects with the second antenna series to share a predetermined antenna unit among many antenna units. A part of the antenna units is connected in series to extend from a first and a second transmission lines of the predetermined antenna unit to compose the first antenna series, and the other antenna units are connected in series to extend from a third and a fourth transmission lines of the predetermined antenna unit to compose the second antenna series. The control units control the transmission paths between the first to the fourth transmission lines and the antenna units, and switch a leaky beam to different scanning planes, wherein the leaky beam scans with frequency variation through the antenna units.
MULTIPLEXED BI-DIRECTIONAL CIRCULATOR
(2011-09-15)
Chang Rong-Yuan
;
Chen Fu-Chiarng
In the present invention, a novel multi-port microwave circuit, also known as a multiple bi-directional circulator, is designed based upon the basis of the EBG characteristic of the meta-materials. Firstly, the concept of the traditional single-layered mushroom structure is extended with the suspending microstrip line to the multi-layered structure. In this way, the multi-layered structure can reveal multi-band EBG characteristic and achieve miniaturization. Moreover, we use three sets of proposed dual-band EBG circuit to be series-connected in a ring-type structure. By using proper impedance matching, the design of the multiple bi-directional circulator is accomplished. It combines the capabilities of the diplexer, the duplexer and the circulator. The triplex bi-directional circulator can integrate three kinds of communication systems with each other, which operates at frequencies comprising GSM 1800 MHz, WiFi 2.45 GHz, and WiMAX 3.5 GHz, respectively. It is suitable for the information integration of multi-band and multi-system communication applications.
Print dipole antenna and manufacturing method thereof
(2012-02-14)
Cheng Li-Yuan
;
Chen Fu-Chiarng
The present invention discloses a print dipole antenna and manufacturing method thereof. The print dipole antenna has a plurality of resonance frequencies, which comprises a substrate, a ring microstrip line and a ground plane. The ring microstrip line is disposed on one side of the substrate, and the interior of the ring microstrip line is symmetrically disposed with a plurality of parasitic metals. The ground plane is disposed on the other side of the substrate, and has a hollow portion corresponding to the central area of the ring microstrip line. The ring microstrip line has a plurality of end ports including input end ports and output end ports, which may further comprise an open circuit end. The plurality of parasitic metals may be of linear shape or bended in arbitrarily windings. A normal mode signal is fed from the end points of the plurality of parasitic metals.
Tri-frequency duplexer circuit and multi-frequency duplexer circuit
(2011-08-09)
Chen Fu-Chiarng
;
Wang Shi-Yung
The present invention discloses a tri-frequency duplexer circuit and multi-frequency duplexer circuit. The tri-frequency duplexer circuit comprises a microstrip line circuit, two first mushrooms, two second mushrooms and two third mushrooms. The microstrip line circuit comprises a first Input/Output (I/O) port, a second I/O port, a third I/O port and a fourth I/O port. The two first mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the third I/O port. The two second mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the fourth I/O port. The two third mushrooms are respectively disposed at transmission line paths between the first I/O port and the third I/O port and between the first I/O port and the fourth I/O port.
多頻道多標準無線通訊系統關鍵射頻技術之研發(III)-微波極化量測系統之建立與極化掃描在無線通訊之應用(III)
(2005)
陳富強
;
Chen Fu-Chiarng
;
交通大學電信工程系
多頻道多標準無線通訊系統關鍵射頻技術之研發--子計畫四:微波極化量測系統之建立與極化掃描在無線通訊之應用(I)
(2004)
陳富強
;
Chen Fu-Chiarng
;
交通大學電信工程系
寬頻微波擷取技術---子計畫四：建立ADI-FDTD模擬平台探討後設物質於行動裝置應用
(2006)
陳富強
;
Chen Fu-Chiarng
;
交通大學電信工程系
隨著個人行動通訊產品普遍使用，造成人體暴露於電磁環境中。大眾逐漸關心電磁波對於人體的影響。在常用通訊產品中，由於手機使用時最接近人體，也因此最受重視。一般手機電磁規範，主要是量測特定吸收效率值(SAR)，藉而得知人體組織所吸收電磁輻射強度。另一方面，許多研究利用時域有限差分法並結合人頭模型，可以有效準確預測人體特定吸收效率值。最近，後設材質(Metamaterials)的電磁特性引起廣大興趣。其電磁特性不同於一般自然界常見的物質。藉由適當週期性排列細金屬片以及分離式環形共振器，可使物質的介電係數(u)與導磁係數(ε)為負值，目前後設材質已引起廣泛研究並應用於許多高頻電路中。在本計畫中，第一年將建立人頭電磁模擬環境，包括電磁數值模擬平台建立並將人頭模型整合入模擬平台。並發展無條件穩定時域有限差分法以加快運算時間。在第二年中，將藉由後設材質的電磁特性，應用於行動通訊產品以減低對於人體特定吸收效率。我們將建立後設材質電磁模擬方法，以瞭解其物理與電磁特性。藉由適當設計後設材質置於行動通訊設備，藉此觀察減低人體特定吸收效率的成效。第三年藉由電磁數值模擬方法提出對於總計畫系統整合電磁效應可能改善方法。
寬頻微波擷取技術---子計畫四：建立ADI-FDTD模擬平台探討後設物質於行動裝置應用
(2007)
陳富強
;
Chen Fu-Chiarng
;
國立交通大學電信工程學系(所)
隨著個人行動通訊產品普遍使用，造成人體暴露於電磁環境中。大眾逐漸關心電磁波對於人體的影響。在常用通訊產品中，由於手機使用時最接近人體，也因此最受重視。一般手機電磁規範，主要是量測特定吸收效率值(SAR)，藉而得知人體組織所吸收電磁輻射強度。另一方面，許多研究利用時域有限差分法並結合人頭模型，可以有效準確預測人體特定吸收效率值。最近，後設材質(Metamaterials)的電磁特性引起廣大興趣。其電磁特性不同於一般自然界常見的物質。藉由適當週期性排列細金屬片以及分離式環形共振器，可使物質的介電係數(u)與導磁係數(ε)為負值，目前後設材質已引起廣泛研究並應用於許多高頻電路中。在本計畫中，第一年將建立人頭電磁模擬環境，包括電磁數值模擬平台建立並將人頭模型整合入模擬平台。並發展無條件穩定時域有限差分法以加快運算時間。在第二年中，將藉由後設材質的電磁特性，應用於行動通訊產品以減低對於人體特定吸收效率。我們將建立後設材質電磁模擬方法，以瞭解其物理與電磁特性。藉由適當設計後設材質置於行動通訊設備，藉此觀察減低人體特定吸收效率的成效。第三年藉由電磁數值模擬方法提出對於總計畫系統整合電磁效應可能改善方法。
寬頻微波擷取技術---子計畫四：建立ADI-FDTD模擬平台探討後設物質於行動裝置應用
(2008)
陳富強
;
Chen Fu-Chiarng
;
國立交通大學電信工程學系(所)
隨著個人行動通訊產品普遍使用，造成人體暴露於電磁環境中。大眾逐漸關心電磁波對於人體的影響。在常用通訊產品中，由於手機使用時最接近人體，也因此最受重視。一般手機電磁規範，主要是量測特定吸收效率值(SAR)，藉而得知人體組織所吸收電磁輻射強度。另一方面，許多研究利用時域有限差分法並結合人頭模型，可以有效準確預測人體特定吸收效率值。最近，後設材質(Metamaterials)的電磁特性引起廣大興趣。其電磁特性不同於一般自然界常見的物質。藉由適當週期性排列細金屬片以及分離式環形共振器，可使物質的介電係數(u)與導磁係數(ε)為負值，目前後設材質已引起廣泛研究並應用於許多高頻電路中。在本計畫中，第一年將建立人頭電磁模擬環境，包括電磁數值模擬平台建立並將人頭模型整合入模擬平台。並發展無條件穩定時域有限差分法以加快運算時間。在第二年中，將藉由後設材質的電磁特性，應用於行動通訊產品以減低對於人體特定吸收效率。我們將建立後設材質電磁模擬方法，以瞭解其物理與電磁特性。藉由適當設計後設材質置於行動通訊設備，藉此觀察減低人體特定吸收效率的成效。第三年藉由電磁數值模擬方法提出對於總計畫系統整合電磁效應可能改善方法。
後設材料於智慧型天線及微波元件之設計與應用
(2009)
陳富強
;
Chen Fu-Chiarng
;
國立交通大學電信工程學系(所)
超解析度微波成像之研究與應用
(2004)
陳富強
;
Chen Fu-Chiarng
;
交通大學電信工程系