TWI409991B - Slot antenna - Google Patents
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Abstract
Description
本發明涉及天線，尤其涉及一種槽孔天線。 The present invention relates to antennas, and more particularly to a slot antenna.
無線通信領域中，微波存取全球互通(World Interoperability for Microwave Access，WiMAX)標準所覆蓋的頻段有2.3GHz~2.4GHz，2.496GHz~2.690GHz，3.4GHz~3.6GHz及3.6GHz~3.8GHz。在習知技術中，一種結構的槽孔天線輻射出的頻率往往只能夠覆蓋WiMAX標準下的某一單一頻段，且其迴波損耗-10dB的阻抗頻寬比較窄。如果要擴展迴波損耗-10dB的阻抗頻寬，就必須使用多種結構不同的槽孔天線來覆蓋多個頻段。這樣就對用戶的多頻段需求帶來極大不便，同時也給用戶帶來增加成本的壓力。所以，在滿足無線通信標準之頻段範圍下，如何以低成本來實現一種能夠覆蓋多頻段且能擴展迴波損耗-10dB的阻抗頻寬的天線是一大挑戰。 In the field of wireless communication, the frequency bands covered by the World Interoperability for Microwave Access (WiMAX) standard are 2.3 GHz to 2.4 GHz, 2.496 GHz to 2.690 GHz, 3.4 GHz to 3.6 GHz, and 3.6 GHz to 3.8 GHz. In the prior art, the frequency of a slot antenna radiated by a structure can only cover a single frequency band under the WiMAX standard, and the impedance bandwidth of the return loss -10 dB is relatively narrow. If you want to extend the impedance bandwidth of the return loss by -10dB, you must use a variety of slot antennas with different structures to cover multiple frequency bands. This brings great inconvenience to the user's multi-band demand, and also brings pressure to the user to increase costs. Therefore, in the frequency range that satisfies the wireless communication standard, how to realize an antenna capable of covering multiple frequency bands and capable of extending the impedance loss of -10 dB of the return loss is a challenge at a low cost.
有鑒於此，需要提供一種天線，可實現多頻段覆蓋與擴展阻抗頻寬。 In view of this, it is necessary to provide an antenna that can achieve multi-band coverage and extended impedance bandwidth.
一種槽孔天線，設置於基板上，該基板包括第一表面與該第 一表面相對的第二表面，該槽孔天線包括饋入部、接地部及輻射體。饋入部設置於該基板的第一表面，用於饋入電磁波訊號。接地部呈矩形，設置於該基板的第二表面，其中心部位有一圓形槽孔。輻射體設置於該基板的第二表面，包括至少一個長條形微帶線，連接於該圓形槽孔的圓周處，且向該圓形槽孔的圓心延伸，其中，該饋入部與該輻射體相互耦合以輻射電磁波訊號，該輻射體包括第一輻射部、第二輻射部與第三輻射部。第一輻射部連接於該第二表面的圓形槽孔的圓周上並向該圓形槽孔的圓心延伸，且與該饋入部平行。第二輻射部與第三輻射部連接於該第二表面的圓形槽孔的圓周上並向該圓形槽孔的圓心延伸，其中該第二輻射部與該第三輻射部以該饋入部在該第二表面的投影為對稱軸呈對稱結構，該第一輻射部與該饋入部在該第二表面的投影相對。 A slot antenna disposed on a substrate, the substrate including a first surface and the first a second surface opposite the surface, the slot antenna comprising a feed portion, a ground portion, and a radiator. The feeding portion is disposed on the first surface of the substrate for feeding electromagnetic wave signals. The grounding portion has a rectangular shape and is disposed on the second surface of the substrate, and has a circular slot at a central portion thereof. The radiator is disposed on the second surface of the substrate, and includes at least one elongated microstrip line connected to the circumference of the circular slot and extending toward a center of the circular slot, wherein the feeding portion and the The radiators are coupled to each other to radiate electromagnetic wave signals, and the radiators include a first radiating portion, a second radiating portion, and a third radiating portion. The first radiating portion is connected to the circumference of the circular slot of the second surface and extends toward the center of the circular slot and is parallel to the feeding portion. The second radiating portion and the third radiating portion are connected to the circumference of the circular slot of the second surface and extend toward the center of the circular slot, wherein the second radiating portion and the third radiating portion are the feeding portion The projection on the second surface is a symmetrical structure with an axis of symmetry, and the first radiating portion is opposite to the projection of the feeding portion on the second surface.
藉由以下對具體實施方式詳細的描述結合附圖，將可輕易的瞭解上述內容及此項發明之諸多優點。 The above and many advantages of the invention will be readily apparent from the following detailed description of the preferred embodiments.
10‧‧‧槽孔天線 10‧‧‧Slot antenna
102‧‧‧基板第一表面 102‧‧‧The first surface of the substrate
104‧‧‧基板第二表面 104‧‧‧Second surface of the substrate
20‧‧‧饋入部 20‧‧‧Feeding Department
30‧‧‧輻射體 30‧‧‧ radiator
302‧‧‧第一輻射部 302‧‧‧First Radiation Department
304‧‧‧第二輻射部 304‧‧‧Second Radiation Department
306‧‧‧第三輻射部 306‧‧‧ Third Radiation Department
40‧‧‧接地部 40‧‧‧ Grounding Department
圖1A與圖1B為本發明實施方式中槽孔天線10之正面及反面示意圖。 1A and 1B are schematic diagrams showing the front and back sides of a slot antenna 10 according to an embodiment of the present invention.
圖2為本發明實施方式中槽孔天線10之尺寸圖。 2 is a dimensional view of the slot antenna 10 in accordance with an embodiment of the present invention.
圖3為圖1A與圖1B中的槽孔天線10沒有設置第一輻射部302、第二輻射部304與第三輻射部306時，不同半徑R所對應的迴波損耗測試對比圖。 FIG. 3 is a comparison diagram of return loss tests corresponding to different radii R when the slot antenna 10 of FIG. 1A and FIG. 1B is not provided with the first radiating portion 302, the second radiating portion 304, and the third radiating portion 306.
圖4為圖1A與圖1B中的槽孔天線10沒有設置第二輻射部304與第三輻射部306時，第一輻射部302具不同長度時所對應的迴波損耗測試對比圖。 4 is a comparison diagram of return loss tests corresponding to the first radiating portion 302 having different lengths when the slot antenna 10 of FIG. 1A and FIG. 1B is not provided with the second radiating portion 304 and the third radiating portion 306.
圖5為圖1A和圖1B中所示槽孔天線10的第二輻射部304與第三輻射部306的長度、寬度以及與饋入部20的夾角Ψ改變後的迴波損耗測試對比圖。 5 is a comparison diagram of the return loss of the second radiating portion 304 and the third radiating portion 306 of the slot antenna 10 shown in FIGS. 1A and 1B, and the return loss after changing the angle Ψ with the feeding portion 20.
圖6為本發明實施方式中的槽孔天線10同時具有第一輻射部302、第二輻射部304與第三輻射部306和沒有設置第一輻射部302、第二輻射部304與第三輻射部306時的迴波損耗測試對比圖。 6 is a slot antenna 10 in the embodiment of the present invention having a first radiating portion 302, a second radiating portion 304 and a third radiating portion 306, and a first radiating portion 302, a second radiating portion 304, and a third radiating portion. A comparison of the return loss test at 306.
請參閱圖1A與圖1B，所示為本發明實施方式中槽孔天線10之正面及反面示意圖。在本實施方式中，槽孔天線10設置於基板上，該基板包括第一表面102及該第一表面102相對的第二表面104。槽孔天線10包括饋入部20、輻射體30及接地部40。 Please refer to FIG. 1A and FIG. 1B , which are schematic diagrams showing the front and back sides of the slot antenna 10 in the embodiment of the present invention. In the present embodiment, the slot antenna 10 is disposed on a substrate including a first surface 102 and a second surface 104 opposite the first surface 102. The slot antenna 10 includes a feed portion 20, a radiator 30, and a ground portion 40.
饋入部20設置於基板的第一表面102，呈長條形，用於饋入電磁波訊號。在本實施方式中，該饋入部20延伸至該圓形槽孔的圓心在該第一表面102的投影處。 The feeding portion 20 is disposed on the first surface 102 of the substrate and has an elongated shape for feeding electromagnetic wave signals. In the present embodiment, the feed portion 20 extends to the center of the circular slot at the projection of the first surface 102.
輻射體30設置於基板的第二表面104，包括至少一長條形微帶線。在本實施方式中，輻射體30包括第一輻射部302、第二輻射部304及第三輻射部306。其中，第一輻射部302呈長 條形，連接於該第二表面104的圓形槽孔的圓周處，向該圓形槽孔的圓心延伸，且與該饋入部20平行，而且該第一輻射部302與該饋入部20在第二表面104的投影相對。第二輻射部304及第三輻射部306都呈長條形，連接於該第二表面104的圓形槽孔的圓周處，向該圓形槽孔的圓心延伸，而且第二輻射部304與第三輻射部306以該饋入部20在第二表面104的投影為對稱軸呈對稱結構，並與該對稱軸的夾角Ψ小於90°。在本實施方式中，該饋入部20與該輻射體30相互耦合以輻射電磁波訊號。 The radiator 30 is disposed on the second surface 104 of the substrate and includes at least one elongated microstrip line. In the present embodiment, the radiator 30 includes a first radiating portion 302, a second radiating portion 304, and a third radiating portion 306. Wherein the first radiating portion 302 is long a strip extending from a circumference of the circular slot of the second surface 104, extending toward a center of the circular slot and parallel to the feeding portion 20, and the first radiating portion 302 and the feeding portion 20 are The projection of the second surface 104 is opposite. The second radiating portion 304 and the third radiating portion 306 are both elongated, connected to the circumference of the circular slot of the second surface 104, extending toward the center of the circular slot, and the second radiating portion 304 and The third radiating portion 306 has a symmetrical structure with the projection of the feeding portion 20 on the second surface 104 as an axis of symmetry, and the angle Ψ with the axis of symmetry is less than 90°. In the present embodiment, the feeding portion 20 and the radiator 30 are coupled to each other to radiate electromagnetic wave signals.
接地部40呈矩形，設置於該基板的第二表面104，與輻射體30電性連接，其中心部位有一圓形槽孔。在本實施方式中，接地部40為基板的第二表面104上除去圓形槽孔之外的區域，並且該接地部40在該第一表面102上的投影與該饋入部20部分重合。 The grounding portion 40 has a rectangular shape and is disposed on the second surface 104 of the substrate. The grounding portion 40 is electrically connected to the radiator 30 and has a circular slot at a central portion thereof. In the present embodiment, the ground portion 40 is a region on the second surface 104 of the substrate except for the circular slot, and the projection of the ground portion 40 on the first surface 102 partially overlaps the feed portion 20 .
請參閱圖2，為圖1A與圖1B所示的槽孔天線10的尺寸圖。在本實施方式中，若槽孔天線10所要覆蓋的低頻段對應的波長為λ1，則該圓形槽孔的周長2πR為2λ1，若槽孔天線10所要覆蓋的高頻段對應的波長為λ2，則第一輻射部302的長度為λ2的四分之一，同時若槽孔天線10所要覆蓋的低頻段對應的頻率為f1，高頻段對應的頻率為f2，則還要滿足f2小於2f1。 Please refer to FIG. 2, which is a dimensional view of the slot antenna 10 shown in FIGS. 1A and 1B. In the present embodiment, if the wavelength corresponding to the low frequency band to be covered by the slot antenna 10 is λ 1 , the circumference of the circular slot 2πR is 2λ 1 , and the wavelength corresponding to the high frequency band to be covered by the slot antenna 10 λ 2 , the length of the first radiating portion 302 is a quarter of λ 2 , and if the frequency corresponding to the low frequency band to be covered by the slot antenna 10 is f 1 and the frequency corresponding to the high frequency band is f 2 , To satisfy f 2 is less than 2f 1 .
在本實施方式中，基板為FR4電路板，長度為60mm，寬度為40mm。圓形槽孔的半徑R為15mm，第一輻射部302的長度為 8.43mm，寬度為3mm。饋入部20的長度為20mm，寬度為2.5mm。在其他實施方式中，基板若為其他類型電路板，根據上述設計理論，基板之尺寸可以有所不同。 In the present embodiment, the substrate is an FR4 circuit board having a length of 60 mm and a width of 40 mm. The radius R of the circular slot is 15 mm, and the length of the first radiating portion 302 is 8.43mm, width is 3mm. The feed portion 20 has a length of 20 mm and a width of 2.5 mm. In other embodiments, if the substrate is another type of circuit board, the size of the substrate may vary according to the above design theory.
請參閱圖3，所示為圖1A與圖1B中的槽孔天線10沒有設置第一輻射部302、第二輻射部304與第三輻射部306時，不同半徑R所對應的迴波損耗測試對比圖。如圖所示，圓形槽孔的半徑R越大，其迴波損耗在小於-10dB所覆蓋的頻段就會越靠近低頻段。 Please refer to FIG. 3, which shows the return loss test corresponding to different radii R when the slot antenna 10 in FIG. 1A and FIG. 1B is not provided with the first radiating portion 302, the second radiating portion 304 and the third radiating portion 306. Comparison chart. As shown in the figure, the larger the radius R of the circular slot, the closer the return loss will be to the low frequency band in the frequency band covered by less than -10 dB.
請參閱圖4，所示為圖1A與圖1B中的槽孔天線10沒有設置第二輻射部304與第三輻射部306時，第一輻射部302具不同長度時所對應的迴波損耗測試對比圖。如圖所示，當第一輻射部302的長度等於11.40mm時，其迴波損耗在小於-10dB所覆蓋的頻段為2.25GHz~2.42GHz和3.42GHz~3.76GHz，當第一輻射部302的長度等於8.42mm時，其迴波損耗在小於-10dB所覆蓋的頻段為2.46GHz~4.04GHz，當第一輻射部302的長度等於5.43mm時，其迴波損耗在小於-10dB所覆蓋的頻段為2.53GHz~3.42GHz。從圖中可知，本實施方式中藉由設置第一輻射部302並且改變其長度可以使得該天線在滿足行業標準的前提下能覆蓋到不同頻段，從而可以極大地滿足用戶對不同頻段的靈活性需求。 Referring to FIG. 4, the return loss test corresponding to the first radiating portion 302 having different lengths when the slot antenna 10 in FIG. 1A and FIG. 1B is not provided with the second radiating portion 304 and the third radiating portion 306 is shown. Comparison chart. As shown in the figure, when the length of the first radiating portion 302 is equal to 11.40 mm, the frequency band covered by the return loss is less than -10 dB, which is 2.25 GHz to 2.42 GHz and 3.42 GHz to 3.76 GHz, when the first radiating portion 302 When the length is equal to 8.42mm, the return loss is 2.46GHz~4.04GHz in the frequency band covered by less than -10dB. When the length of the first radiating part 302 is equal to 5.43mm, the return loss is in the frequency band covered by less than -10dB. It is 2.53GHz~3.42GHz. As can be seen from the figure, in the embodiment, by setting the first radiating portion 302 and changing the length thereof, the antenna can cover different frequency bands while satisfying the industry standard, thereby greatly satisfying the flexibility of the user for different frequency bands. demand.
請參閱圖5，為在圖1A和圖1B所示的槽孔天線10中同時設置第一輻射部302、第二輻射部304與第三輻射部306時，在圖2所示的尺寸圖的基礎上藉由改變第二輻射部304與第三輻射 部306的長度、寬度以及與饋入部20的夾角Ψ後的迴波損耗測試對比圖。在其他實施方式中，基板若為其他類型電路板，根據上述設計理論，基板之尺寸會有所不同。 Referring to FIG. 5, in the case of simultaneously providing the first radiating portion 302, the second radiating portion 304 and the third radiating portion 306 in the slot antenna 10 shown in FIGS. 1A and 1B, in the dimensional drawing shown in FIG. Based on the second radiation portion 304 and the third radiation A comparison of the length, width, and return loss of the portion 306 with the angle of return of the feed portion 20. In other embodiments, if the substrate is another type of circuit board, the size of the substrate may vary according to the above design theory.
當第二輻射部304與第三輻射部306的長度為0mm、寬度為0mm以及與饋入部20的夾角Ψ=0°時，槽孔天線10的迴波損耗測試圖如本圖中的曲線a所示；當第二輻射部304與第三輻射部306的長度為3.43mm、寬度為3.0mm以及與饋入部20的夾角Ψ=60°時，槽孔天線10的迴波損耗測試圖如本圖中的曲線b所示；當第二輻射部304與第三輻射部306的長度為3.47mm、寬度為2.0mm以及與饋入部20的夾角Ψ=30°時，槽孔天線10的迴波損耗測試圖如本圖中的曲線c所示；當第二輻射部304與第三輻射部306的長度為6.47mm、寬度為2.0mm以及與饋入部20的夾角Ψ=30°時，槽孔天線10的迴波損耗測試圖如本圖中的曲線d所示。 When the length of the second radiating portion 304 and the third radiating portion 306 is 0 mm, the width is 0 mm, and the angle Ψ=0° with the feeding portion 20, the return loss test chart of the slot antenna 10 is as the curve a in the figure. As shown in the figure, when the length of the second radiating portion 304 and the third radiating portion 306 is 3.43 mm, the width is 3.0 mm, and the angle Ψ between the feeding portion 20 and 馈 = 60°, the return loss test chart of the slot antenna 10 is as shown. The curve b of the figure shows the echo of the slot antenna 10 when the length of the second radiating portion 304 and the third radiating portion 306 is 3.47 mm, the width is 2.0 mm, and the angle Ψ between the feeding portion 20 is 30°. The loss test chart is as shown by the curve c in the figure; when the length of the second radiating portion 304 and the third radiating portion 306 is 6.47 mm, the width is 2.0 mm, and the angle Ψ=30° with the feeding portion 20, the slot The return loss test chart of the antenna 10 is as shown by the curve d in the figure.
如圖所示，在設置第二輻射部304與第三輻射部306後所測得的迴波損耗(如曲線b，c，d所示)均比在沒有設置第二輻射部304與第三輻射部306所測得的迴波損耗(如曲線a所示)低，也即，藉由設置第二輻射部304可以進一步降低迴波損耗。對比曲線c和曲線d可知，在其他參數都不變的情況下，藉由增加第二輻射部304的長度可以大大降低迴波損耗。所以本實施方式藉由設置第二輻射部304與第三輻射部306並且增加其長度等方式均可以大大降低其迴波損耗，從而滿足對迴波損耗有嚴格要求之用戶的需求。 As shown, the return loss (as shown by the curves b, c, d) measured after the second radiating portion 304 and the third radiating portion 306 are disposed is higher than the second radiating portion 304 and the third portion are not disposed. The return loss measured by the radiating portion 306 (as shown by the curve a) is low, that is, the return loss can be further reduced by providing the second radiating portion 304. Comparing the curve c and the curve d, it can be seen that the return loss can be greatly reduced by increasing the length of the second radiating portion 304 while other parameters are unchanged. Therefore, the present embodiment can greatly reduce the return loss by providing the second radiating portion 304 and the third radiating portion 306 and increasing the length thereof, thereby satisfying the demand of users who have strict requirements for return loss.
請參閱圖6，所示為本發明實施方式中的槽孔天線10同時設置第一輻射部302、第二輻射部304與第三輻射部306和沒有設置第一輻射部302、第二輻射部304與第三輻射部306時的迴波損耗測試對比圖。如圖所示，曲線e是根據圖5中曲線b(同時設置第一輻射部302、第二輻射部304與第三輻射部306)的參數所測得的迴波損耗圖，其迴波損耗在小於-10dB所覆蓋的頻段為2.46GHz~4.04GHz，即fH=4.04GHz，fL=2.46GHz，所以其中心頻率fc=fL+(fH-fL)/2=3.25GHz，從而可以得出，其迴波損耗-10dB的阻抗頻寬BW=(fH-fL)/fc=48.6%。如圖所示，曲線f是沒有設置第一輻射部302、第二輻射部304與第三輻射部306所測得的迴波損耗圖(其他參數與圖5中曲線b的其他參數相同)，由圖可知其迴波損耗在小於-10dB所覆蓋的頻段為2.76GHz~3.39GHz，即fH′=3.39GHz，fL′=2.76GHz，所以其中心頻率fc′=fL′+(fH′-fL′)/2=3.08GHz，從而可以得出，其迴波損耗-10dB的阻抗頻寬BW′=(fH′-fL′)/fc′=20.4%。藉由對比BW與BW′的值可以看出，在本實施方式中，藉由同時設置第一輻射部302、第二輻射部304與第三輻射部306可以極大的擴展該槽孔天線10的迴波損耗-10dB阻抗頻寬，從而滿足對迴波損耗-10dB阻抗頻寬有特殊要求之用戶的需求。 Referring to FIG. 6, the slot antenna 10 in the embodiment of the present invention is provided with a first radiating portion 302, a second radiating portion 304 and a third radiating portion 306, and a first radiating portion 302 and a second radiating portion. A comparison of return loss tests for 304 and third radiating portion 306. As shown, the curve e is a return loss map measured according to the parameters of the curve b (simultaneously setting the first radiating portion 302, the second radiating portion 304, and the third radiating portion 306) of FIG. 5, and the return loss thereof. The frequency band covered by less than -10dB is 2.46GHz~4.04GHz, that is, f H =4.04GHz, f L =2.46GHz, so its center frequency f c =f L +(f H -f L )/2=3.25GHz Thus, it can be concluded that the impedance bandwidth of the return loss -10 dB is BW = (f H - f L ) / f c = 48.6%. As shown, the curve f is a return loss map measured without the first radiating portion 302, the second radiating portion 304, and the third radiating portion 306 (other parameters are the same as the other parameters of the curve b in FIG. 5), It can be seen from the figure that the frequency band covered by the return loss is less than -10dB, which is 2.76GHz~3.39GHz, that is, f H '=3.39GHz, f L '=2.76GHz, so its center frequency f c '=f L '+( f H '-f L ')/2 = 3.08 GHz, so that the impedance bandwidth of the return loss -10 dB BW' = (f H '-f L ') / f c ' = 20.4% can be obtained. By comparing the values of BW and BW', it can be seen that in the present embodiment, the slot antenna 10 can be greatly expanded by simultaneously providing the first radiating portion 302, the second radiating portion 304, and the third radiating portion 306. The return loss is -10dB impedance bandwidth, which meets the needs of users who have special requirements for return loss -10dB impedance bandwidth.
本發明實施方式中藉由在圓形槽孔內同時設置第一輻射部302、第二輻射部304與第三輻射部306，改變第一輻射部302或第二輻射部304與第三輻射部306的長度，不僅可以實現利 用一種結構的天線覆蓋複數頻段，而且還可以大大降低其迴波損耗，同時還能極大的擴展該槽孔天線的迴波損耗-10dB阻抗頻寬，滿足不同用戶的需求。 In the embodiment of the present invention, the first radiating portion 302 or the second radiating portion 304 and the third radiating portion are changed by simultaneously providing the first radiating portion 302, the second radiating portion 304, and the third radiating portion 306 in the circular slot. The length of 306 can not only achieve profit The multi-frequency band is covered by a structure antenna, and the return loss can be greatly reduced, and the return loss of the slot antenna can be greatly expanded to the -10 dB impedance bandwidth to meet the needs of different users.
綜上所述，本發明符合發明專利要件，爰依法提出專利申請。惟，以上該者僅為本發明之較佳實施例，舉凡熟悉本案技藝之人士，在爰依本案發明精神所作之等效修飾或變化，皆應包含於以下之申請專利範圍內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only a preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.
10‧‧‧槽孔天線 10‧‧‧Slot antenna
104‧‧‧基板第二表面 104‧‧‧Second surface of the substrate
30‧‧‧輻射體 30‧‧‧ radiator
302‧‧‧第一輻射部 302‧‧‧First Radiation Department
304‧‧‧第二輻射部 304‧‧‧Second Radiation Department
306‧‧‧第三輻射部 306‧‧‧ Third Radiation Department
40‧‧‧接地部 40‧‧‧ Grounding Department
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98120414A TWI409991B (en) | 2009-06-18 | 2009-06-18 | Slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98120414A TWI409991B (en) | 2009-06-18 | 2009-06-18 | Slot antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201101585A TW201101585A (en) | 2011-01-01 |
| TWI409991B true TWI409991B (en) | 2013-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW98120414A TWI409991B (en) | 2009-06-18 | 2009-06-18 | Slot antenna |
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| Country | Link |
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| TW (1) | TWI409991B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112736471B (en) * | 2020-12-23 | 2023-08-04 | Oppo广东移动通信有限公司 | Antenna and electronic equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW466800B (en) * | 2000-05-02 | 2001-12-01 | Jin-Lu Weng | A single-feed circularly polarized printed wide slot antenna with reduced slot size |
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2009
- 2009-06-18 TW TW98120414A patent/TWI409991B/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW466800B (en) * | 2000-05-02 | 2001-12-01 | Jin-Lu Weng | A single-feed circularly polarized printed wide slot antenna with reduced slot size |
Non-Patent Citations (1)
| Title |
|---|
| Jyh-Ying Chiou, Jia-Yi Sze, and Kin-Lu Wong," A Broad-Band CPW-Fed Strip-Loaded Square Slot Antenna" IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 51, NO. 4, APRIL 2003 * |
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