TWI484696B - Antenna apparatus with adaptive polarization switching function - Google Patents
Antenna apparatus with adaptive polarization switching function Download PDFInfo
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Description
本發明係指一種具適應性極化切換功能之天線裝置，尤指一種藉由調整輸出至兩支線性極化天線之能量比例及相位差而達到極化方向切換之天線裝置。 The present invention relates to an antenna device with adaptive polarization switching function, and more particularly to an antenna device that achieves polarization direction switching by adjusting the energy ratio and phase difference outputted to two linearly polarized antennas.
具有無線通訊功能的電子產品，如筆記型電腦、個人數位助理(Personal Digital Assistant)等，係透過天線來發射或接收無線電波，以傳遞或交換無線電訊號，進而存取無線網路。因此，為了讓使用者能更方便地存取無線通訊網路，理想天線的頻寬應在許可範圍內盡可能地增加，而尺寸則應盡量減小，以配合電子產品體積縮小之趨勢。 Electronic products with wireless communication functions, such as a notebook computer, a personal digital assistant, etc., transmit or receive radio waves through an antenna to transmit or exchange radio signals to access a wireless network. Therefore, in order to make it easier for users to access the wireless communication network, the bandwidth of the ideal antenna should be increased as much as possible within the allowable range, and the size should be minimized to match the trend of shrinking electronic products.
除此之外，隨著無線通訊技術不斷演進，電子產品所配置的天線數量可能增加。舉例來說，無線區域網路標準IEEE 802.11n支援多輸入多輸出(Multi-input Multi-output，MIMO)通訊技術，亦即相關電子產品可透過多組天線同步收發無線訊號，以在不增加頻寬或總發射功率耗損(Transmit Power Expenditure)的情況下，大幅地增加系統的資料吞吐量(Throughput)及傳送距離，進而有效提升無線通訊系統之頻譜效率及傳輸速率，改善通訊品質。 In addition, as wireless communication technologies continue to evolve, the number of antennas configured for electronic products may increase. For example, the wireless local area network standard IEEE 802.11n supports multi-input multi-output (MIMO) communication technology, that is, related electronic products can synchronously transmit and receive wireless signals through multiple sets of antennas, so as not to increase the frequency. In the case of wide or total transmit power loss (Transmit Power Expenditure), the data throughput (Throughput) and transmission distance of the system are greatly increased, thereby effectively improving the spectrum efficiency and transmission rate of the wireless communication system, and improving communication quality.
在習知技術中，多輸入多輸出系統中之每一天線皆具有固定極化方向，而無法根據系統需求進行調整。在此情形下，發射端與接收端可能會因天線極化不匹配而造成極化損耗，影響傳輸效率。 In the prior art, each antenna in a multiple input multiple output system has a fixed polarization direction and cannot be adjusted according to system requirements. In this case, the transmitting end and the receiving end may cause polarization loss due to antenna polarization mismatch, which affects transmission efficiency.
另一方面，對於採用極化分集(polarization diversity)技術之多輸入多輸出系統來說，若多組天線皆能根據傳輸環境的情況，適當地調整每一天線之極化方向，而使每一天線之極化損耗得以降到最低。如此一來，將可最佳化極化分集之效果，而達到最高的傳輸效率。 On the other hand, for a multiple input multiple output system using polarization diversity technology, if multiple sets of antennas can properly adjust the polarization direction of each antenna according to the transmission environment, each day The polarization loss of the line is minimized. In this way, the effect of polarization diversity can be optimized to achieve the highest transmission efficiency.
因此，本發明之主要目的即在於提供一種具適應性極化切換功能之天線裝置。 Accordingly, it is a primary object of the present invention to provide an antenna device having an adaptive polarization switching function.
本發明揭露一種具適應性極化切換功能之天線裝置，其包含有一天線陣列及一饋入單元。該天線陣列包含有一第一線性極化天線及一第二線性極化天線。該第一線性極化天線與該第二線性極化天線具有互相正交之極化方向。該饋入單元包含有一輸入端、一第一輸出端及一第二輸出端。該輸入端接收一傳輸訊號，該第一輸出端耦接於該第一線性極化天線，而該第二輸出端耦接於該第二線性極化天線。該饋入單元根據一控制訊號，將該傳輸訊號之能量分配至該第一輸出端及該第二輸出端，以產生該第一線性極化天線之饋入訊號及該第二線性極化天線之饋入訊號，並使該第一線性極化天線之 饋入訊號及該第二線性極化天線之饋入訊號具有一特定相位差。 The invention discloses an antenna device with adaptive polarization switching function, which comprises an antenna array and a feeding unit. The antenna array includes a first linearly polarized antenna and a second linearly polarized antenna. The first linearly polarized antenna and the second linearly polarized antenna have mutually orthogonal polarization directions. The feeding unit includes an input end, a first output end and a second output end. The input terminal receives a transmission signal, the first output end is coupled to the first linearly polarized antenna, and the second output end is coupled to the second linearly polarized antenna. The feeding unit distributes the energy of the transmission signal to the first output end and the second output end according to a control signal to generate a feed signal of the first linearly polarized antenna and the second linear polarization The antenna feeds the signal and causes the first linearly polarized antenna The feed signal and the feed signal of the second linearly polarized antenna have a specific phase difference.
本發明另揭露一種無線裝置，其包含有一天線陣列、一饋入單元及一訊號處理單元。該天線陣列包含有一第一線性極化天線及一第二線性極化天線，該第一線性極化天線與該第二線性極化天線具有互相正交之極化方向。該饋入單元包含有一輸入端、一第一輸出端及一第二輸出端。該輸入端接收一傳輸訊號，該第一輸出端耦接於該第一線性極化天線，該第二輸出端耦接於該第二線性極化天線。該饋入裝置根據一控制訊號，將該傳輸訊號之能量分配至該第一輸出端及該第二輸出端，以產生該第一線性極化天線之饋入訊號及該第二線性極化天線之饋入訊號，並使該第一線性極化天線之饋入訊號及該第二線性極化天線之饋入訊號具有一特定相位差。該訊號處理單元用以產生該傳輸訊號。 The invention further discloses a wireless device comprising an antenna array, a feed unit and a signal processing unit. The antenna array includes a first linearly polarized antenna and a second linearly polarized antenna, and the first linearly polarized antenna and the second linearly polarized antenna have mutually orthogonal polarization directions. The feeding unit includes an input end, a first output end and a second output end. The input end receives a transmission signal, the first output end is coupled to the first linearly polarized antenna, and the second output end is coupled to the second linearly polarized antenna. The feeding device distributes the energy of the transmission signal to the first output end and the second output end according to a control signal to generate a feed signal of the first linearly polarized antenna and the second linear polarization The antenna feeds the signal, and the feed signal of the first linearly polarized antenna and the feed signal of the second linearly polarized antenna have a specific phase difference. The signal processing unit is configured to generate the transmission signal.
請參考第1圖，第1圖為本發明具有適應性極化切換功能之一天線裝置10之示意圖。天線裝置10用來進行無線訊號之收發，其包含有一天線陣列11及一饋入單元12。天線陣列11包含有輻射場極化方向互相正交之線性極化天線Ant1、Ant2。饋入單元12包含有一輸入端122及輸出端124、126。輸入端122用來接收一傳輸訊號S1，而輸出端124、126則分別耦接於天線陣列11中之線性極化天線Ant1、Ant2。饋入單元12可根據一控制訊號CTRL，將傳輸訊號S1之能量分配至輸出端124、126，以產生饋入訊號F1、F2予線性 極化天線Ant1、Ant2，並使其具有一特定相位差。此外，天線裝置10更包含有一控制電路13，耦接於饋入單元12，用來產生控制訊號CTRL。 Please refer to FIG. 1. FIG. 1 is a schematic diagram of an antenna device 10 having an adaptive polarization switching function according to the present invention. The antenna device 10 is configured to perform wireless signal transmission and reception, and includes an antenna array 11 and a feeding unit 12. The antenna array 11 includes linearly polarized antennas Ant1, Ant2 having radiation field polarization directions orthogonal to each other. Feeding unit 12 includes an input 122 and outputs 124, 126. The input terminal 122 is configured to receive a transmission signal S1, and the output terminals 124 and 126 are respectively coupled to the linear polarization antennas Ant1 and Ant2 in the antenna array 11. The feeding unit 12 can distribute the energy of the transmission signal S1 to the output terminals 124 and 126 according to a control signal CTRL to generate the feed signals F1 and F2 to be linear. The antennas Ant1, Ant2 are polarized and have a specific phase difference. In addition, the antenna device 10 further includes a control circuit 13 coupled to the feeding unit 12 for generating the control signal CTRL.
在本發明實施例中，饋入單元12係根據控制訊號CTRL之邏輯狀態，調整傳輸訊號S1輸出至線性極化天線Ant1、Ant2之能量比例及相位差。如此一來，天線陣列11可藉由輻射場極化方向互相正交之線性極化天線Ant1、Ant2，產生各種極化方向之輻射電場。關於天線裝置10之詳細操作方式，請繼續參考以下說明。 In the embodiment of the present invention, the feeding unit 12 adjusts the energy ratio and phase difference of the output signal S1 to the linearly polarized antennas Ant1 and Ant2 according to the logic state of the control signal CTRL. In this way, the antenna array 11 can generate radiation electric fields of various polarization directions by linearly polarizing antennas Ant1 and Ant2 whose radiation field polarization directions are orthogonal to each other. Regarding the detailed operation of the antenna device 10, please continue to refer to the following description.
請參考第2圖，第2圖為第1圖中饋入單元12之運作示意圖。在本發明實施例中，饋入單元12可根據控制訊號CTRL之邏輯狀態，調整輸出至輸出端124及126之能量比例及相位差。舉例來說，控制電路13可產生四種邏輯狀態L1~L4之控制訊號，而饋入單元12則可根據邏輯狀態L1~L4提供不同能量比例及相位差之饋入訊號至輸出端124及126。假設以P表示傳輸訊號S1之能量，如第2圖所示，在邏輯狀態L1的情況下，饋入訊號F1及F2具有相等之能量，其皆為傳輸訊號S1之能量的二分之一，且饋入訊號F1領先饋入訊號F2九十度相位差；在邏輯狀態L2的情況下，饋入訊號F1及F2亦具有相等之能量，其皆為傳輸訊號S1之能量的二分之一，而饋入訊號F1落後饋入訊號F2九十度相位差；在邏輯狀態L3的情況下，饋入訊號F1之能量相等於傳輸訊號S1之能量，而饋入訊號F2之能量為0；相反地，在邏輯狀態L4的情況下，饋入訊號F2 之能量相等於傳輸訊號S1之能量，而饋入訊號F1之能量為0。 Please refer to FIG. 2, which is a schematic diagram of the operation of the feeding unit 12 in FIG. In the embodiment of the present invention, the feeding unit 12 can adjust the energy ratio and phase difference output to the output terminals 124 and 126 according to the logic state of the control signal CTRL. For example, the control circuit 13 can generate four control signals of the logic states L1 to L4, and the feed unit 12 can provide the feed signals of different energy ratios and phase differences to the output terminals 124 and 126 according to the logic states L1 to L4. . Suppose that the energy of the transmission signal S1 is represented by P. As shown in FIG. 2, in the case of the logic state L1, the feed signals F1 and F2 have equal energy, which are one-half of the energy of the transmission signal S1. And the feed signal F1 leads the feed signal F2 by a phase difference of ninety degrees; in the case of the logic state L2, the feed signals F1 and F2 also have equal energy, which are one-half of the energy of the transmission signal S1. The feed signal F1 is delayed by 90 degrees from the feed signal F2; in the logic state L3, the energy fed to the signal F1 is equal to the energy of the transmission signal S1, and the energy fed to the signal F2 is 0; In the case of the logic state L4, the feed signal F2 The energy is equal to the energy of the transmission signal S1, and the energy fed to the signal F1 is zero.
值得注意的是，上述能量分配為一理想狀態，亦即饋入訊號F1及F2之能量總和相等於傳輸訊號S1之能量。實際上，饋入單元12會造成輸入能量的損耗，而使饋入訊號F1及F2之能量總和小於傳輸訊號S1之能量。然而，只要饋入訊號F1及F2之能量分配比例及相位差能控制在可允許的範圍內，仍能達到本發明所述之目的。此外，控制電路13所產生之邏輯狀態數量係取決於饋入單元12的設計。當然，在其他實施例中，饋入裝置12亦可根據控制訊號CTRL之其他邏輯狀態，產生各種能量分配比例及相位差之饋入訊號F1及F2，而不限於此。 It is worth noting that the energy distribution is an ideal state, that is, the sum of the energy of the feed signals F1 and F2 is equal to the energy of the transmission signal S1. In fact, the feed unit 12 causes loss of input energy, and the sum of the energy of the feed signals F1 and F2 is smaller than the energy of the transmission signal S1. However, as long as the energy distribution ratio and phase difference of the feed signals F1 and F2 can be controlled within an allowable range, the object of the present invention can still be achieved. Furthermore, the number of logic states generated by control circuit 13 is dependent on the design of feed unit 12. Of course, in other embodiments, the feeding device 12 can also generate the feeding signals F1 and F2 of various energy distribution ratios and phase differences according to other logic states of the control signal CTRL, without being limited thereto.
在第1圖中，天線陣列11僅以簡單圖形表示其包含水平極化天線Ant1及垂直極化天線Ant2，實際上，如第3圖所示，水平極化天線Ant1及垂直極化天線Ant2可藉由兩支相同之線性極化天線實現，並分別佈置於以正交方式結合之一水平基板15及一垂直基板(未顯示)上。因此，在饋入訊號之能量相同的情況下，水平極化天線Ant1及垂直極化天線Ant2可分別用來提供能量相同之一水平極化(Horizontal Polarization)輻射電場及一垂直極化(Vertical Polarization)輻射電場。 In FIG. 1, the antenna array 11 is only shown in a simple figure and includes a horizontally polarized antenna Ant1 and a vertically polarized antenna Ant2. In fact, as shown in FIG. 3, the horizontally polarized antenna Ant1 and the vertically polarized antenna Ant2 may be It is realized by two identical linearly polarized antennas, and is respectively arranged to be combined with one horizontal substrate 15 and one vertical substrate (not shown) in an orthogonal manner. Therefore, when the energy of the feed signal is the same, the horizontally polarized antenna Ant1 and the vertically polarized antenna Ant2 can be respectively used to provide one of the same horizontal polarization (Horizontal Polarization) radiation electric field and a vertical polarization (Vertical Polarization). ) Radiation electric field.
在此情形下，天線陣列11可根據訊號饋入方式，提供各種極化方向之輻射電場，以滿足無線通訊系統的需求。舉例來說，若水平 極化天線Ant1之饋入訊號F1與垂直極化天線Ant2之饋入訊號F2大小相同，且饋入訊號F1領先饋入訊號F2九十度相位差，亦即對應第2圖中之邏輯狀態L1，則可產生一右手圓極化(Right-Hand Circular Polarization)之輻射電場；若饋入訊號之大小相同，而饋入訊號F1落後饋入訊號F2九十度相位差，亦即對應第2圖中之邏輯狀態L2，則可產生一左手圓極化(Left-Hand Circular Polarization)之輻射電場；若僅對水平極化天線Ant1饋入訊號，而不對垂直極化天線Ant2饋入任何訊號，亦即對應第2圖中之邏輯狀態L3，則天線陣列11將會產生一水平極化輻射電場；同樣地，若僅對垂直極化天線Ant2饋入訊號，而不對水平極化天線Ant1饋入任何訊號，亦即對應第2圖中之邏輯狀態L4，則天線陣列11將會產生一垂直極化電場。 In this case, the antenna array 11 can provide radiation electric fields of various polarization directions according to the signal feeding manner to meet the requirements of the wireless communication system. For example, if the level The feed signal F1 of the polarized antenna Ant1 is the same as the feed signal F2 of the vertically polarized antenna Ant2, and the feed signal F1 leads the feed signal F2 by a phase difference of ninety degrees, that is, corresponding to the logic state L1 in FIG. , the radiation field of Right-Hand Circular Polarization can be generated; if the size of the feed signal is the same, and the feed signal F1 is behind the feed signal F2, the phase difference is ninety degrees, that is, corresponding to the second figure. In the logic state L2, a radiation electric field of Left-Hand Circular Polarization can be generated; if only the horizontally polarized antenna Ant1 is fed with a signal, and no signal is fed to the vertically polarized antenna Ant2, That is, corresponding to the logic state L3 in FIG. 2, the antenna array 11 will generate a horizontally polarized radiation electric field; likewise, if only the vertically polarized antenna Ant2 is fed with a signal, and no horizontally polarized antenna Ant1 is fed any The signal, that is, corresponding to the logic state L4 in Fig. 2, the antenna array 11 will generate a vertically polarized electric field.
當然，本發明天線裝置10亦可根據實際需求，調整水平極化天線Ant1及垂直極化天線Ant2之饋入訊號的相位及大小，而產生各種線性極化或橢圓極化(elliptical polarization)之輻射電場。舉例來說，若水平極化天線Ant1與垂直極化天線Ant2具有大小相同且不具相位差之饋入訊號，則天線陣列11可產生四十五度極化方向之輻射電場，如此相對應變化亦屬本發明之範圍。 Of course, the antenna device 10 of the present invention can also adjust the phase and size of the feed signals of the horizontally polarized antenna Ant1 and the vertically polarized antenna Ant2 according to actual needs, thereby generating various linear polarization or elliptical polarization radiation. electric field. For example, if the horizontally polarized antenna Ant1 and the vertically polarized antenna Ant2 have the same size and no phase difference feed signal, the antenna array 11 can generate a radiation electric field of forty-five degrees of polarization, and the corresponding change is also It is within the scope of the invention.
如此一來，本發明天線裝置10可依據環境的情況，動態地調整天線輻射場之極化方向，以降低極化損耗，而提高傳輸效率。 In this way, the antenna device 10 of the present invention can dynamically adjust the polarization direction of the antenna radiation field according to the environment to reduce the polarization loss and improve the transmission efficiency.
需注意的是，上述水平極化天線Ant1及垂直極化天線Ant2可藉由任意形式之線性極化天線實現，例如：單極天線、偶極天線，八木天線、平面倒F型天線等，而不限於此。饋入單元12則可根據實際需求，藉由任何具能量分配功能之一進二出傳輸電路系統實現，例如3dB耦合器(coupler)及切換開關之組合等，其皆屬本發明之範圍。 It should be noted that the horizontally polarized antenna Ant1 and the vertically polarized antenna Ant2 can be implemented by any form of linearly polarized antenna, for example, a monopole antenna, a dipole antenna, a Yagi antenna, a planar inverted F antenna, and the like. Not limited to this. The feeding unit 12 can be implemented by any one of the energy distribution functions, such as a 3dB coupler and a combination of switching switches, etc., which are all within the scope of the present invention.
請參考第4圖，第4圖為本發明實施例一無線裝置40之示意圖。無線裝置40可以是任何具有天線設備之無線裝置，例如一無線區域網路(WLAN)裝置或一行動電話，但不限於此。無線裝置40包含有一天線陣列41、一饋入單元42、一控制電路43及一訊號處理單元44。其中，天線陣列41、饋入單元42、控制電路43形成第1圖之天線裝置10，其操作已詳細敘述於上述說明，於此不多加贅述；而訊號處理單元44則用來產生傳輸訊號S1，例如欲傳送至一無線區域網路之封包資料。如此一來，無線裝置40可藉由切換天線輻射場之極化方向，降低傳輸訊號S1之極化損耗，而提高傳輸效率。 Please refer to FIG. 4, which is a schematic diagram of a wireless device 40 according to an embodiment of the present invention. The wireless device 40 can be any wireless device having an antenna device, such as a wireless local area network (WLAN) device or a mobile phone, but is not limited thereto. The wireless device 40 includes an antenna array 41, a feed unit 42, a control circuit 43, and a signal processing unit 44. The antenna array 41, the feeding unit 42, and the control circuit 43 form the antenna device 10 of FIG. 1. The operation of the antenna device 10 is described in detail in the above description, and is not described here. The signal processing unit 44 is used to generate the transmission signal S1. For example, packet data to be transmitted to a wireless local area network. In this way, the wireless device 40 can reduce the polarization loss of the transmission signal S1 by switching the polarization direction of the antenna radiation field, thereby improving the transmission efficiency.
此外，天線裝置10亦可實現於使用多輸入多輸出技術之無線裝置，例如符合IEEE 802.11n標準之無線通訊裝置，以利用極化分集方式增加傳輸信號通道，降低多路徑衰減(multi-path fading)，而提高傳輸效率。請參考第5圖，第5圖為本發明另一實施例一無線裝置50之示意圖。無線裝置50包含有多組天線裝置Arr_1~Arr_n及一訊號處理單元54。每一天線裝置Arr_1~Arr_n係由第1圖之天線 裝置10實現，而可動態調整天線輻射場之極化方向。在此情形下，訊號處理單元54可根據一待傳輸資料DATA，產生每一天線裝置之傳輸訊號S1~Sn，以供天線裝置Arr_1~Arr_n分別利用不同的極化方向來進行傳輸。如此一來，無線裝置50可利用極化分集的方式，提高多輸入多輸出系統之傳輸效率。 In addition, the antenna device 10 can also be implemented in a wireless device using multiple input multiple output technology, such as a wireless communication device conforming to the IEEE 802.11n standard, to increase the transmission signal channel by using polarization diversity, and to reduce multipath fading. ), while improving transmission efficiency. Please refer to FIG. 5. FIG. 5 is a schematic diagram of a wireless device 50 according to another embodiment of the present invention. The wireless device 50 includes a plurality of sets of antenna devices Arr_1~Arr_n and a signal processing unit 54. Each antenna device Arr_1~Arr_n is an antenna of FIG. The device 10 is implemented to dynamically adjust the polarization direction of the antenna radiation field. In this case, the signal processing unit 54 can generate the transmission signals S1 SSn of each antenna device according to a data to be transmitted DATA, so that the antenna devices Arr_1~Arr_n respectively transmit with different polarization directions. In this way, the wireless device 50 can improve the transmission efficiency of the MIMO system by using polarization diversity.
綜上所述，本發明提供一種用於多輸入多輸出系統之天線系統，其可依據空間中雜訊及訊號的強弱與方向，切換天線輻射場的極化方向(包含水平線性極化、垂直線性極化、右手圓形極化及左手圓形極化等)，以利用適應性極化切換方式達到最佳的傳輸效率。 In summary, the present invention provides an antenna system for a multiple input multiple output system, which can switch the polarization direction of an antenna radiation field according to the strength and direction of noise and signals in the space (including horizontal linear polarization and vertical Linear polarization, right-hand circular polarization, left-hand circular polarization, etc.) to achieve optimal transmission efficiency using adaptive polarization switching.
以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
10、Arr_1~Arr_n‧‧‧天線裝置 10, Arr_1~Arr_n‧‧‧Antenna device
11、41‧‧‧天線陣列 11, 41‧‧‧ antenna array
12、42‧‧‧饋入單元 12, 42‧‧‧Feed in unit
13、43‧‧‧控制電路 13, 43‧‧‧ control circuit
Ant1、Ant2‧‧‧天線 Ant1, Ant2‧‧‧ antenna
122‧‧‧輸入端 122‧‧‧ input
124、126‧‧‧輸出端 124, 126‧‧‧ output
S1‧‧‧傳輸訊號 S1‧‧‧ transmission signal
F1、F2‧‧‧饋入訊號 F1, F2‧‧‧ feed signal
CTRL‧‧‧控制訊號 CTRL‧‧‧ control signal
P‧‧‧能量 P‧‧‧Energy
15‧‧‧水平基板 15‧‧‧Horizontal substrate
40、50‧‧‧無線裝置 40, 50‧‧‧ wireless devices
44、54‧‧‧訊號處理單元 44, 54‧‧‧ Signal Processing Unit
第1圖為本發明具有適應性極化切換功能之一天線裝置之示意圖。 FIG. 1 is a schematic diagram of an antenna device having an adaptive polarization switching function according to the present invention.
第2圖為第1圖中饋入單元之運作示意圖。 Figure 2 is a schematic diagram of the operation of the feed unit in Figure 1.
第3圖為第1圖中天線陣列之示意圖。 Figure 3 is a schematic diagram of the antenna array in Figure 1.
第4圖為本發明實施例一無線裝置之示意圖。 FIG. 4 is a schematic diagram of a wireless device according to an embodiment of the present invention.
第5圖為本發明另一實施例一無線裝置之示意圖。 FIG. 5 is a schematic diagram of a wireless device according to another embodiment of the present invention.
10‧‧‧天線裝置 10‧‧‧Antenna device
11‧‧‧天線陣列 11‧‧‧Antenna array
12‧‧‧饋入單元 12‧‧‧Feeding unit
13‧‧‧控制電路 13‧‧‧Control circuit
Ant1、Ant2‧‧‧天線 Ant1, Ant2‧‧‧ antenna
122‧‧‧輸入端 122‧‧‧ input
124、126‧‧‧輸出端 124, 126‧‧‧ output
S1‧‧‧傳輸訊號 S1‧‧‧ transmission signal
F1、F2‧‧‧饋入訊號 F1, F2‧‧‧ feed signal
CTRL‧‧‧控制訊號 CTRL‧‧‧ control signal
Claims (15)
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| TW099100265A TWI484696B (en) | 2010-01-07 | 2010-01-07 | Antenna apparatus with adaptive polarization switching function |
| US12/849,822 US20110032159A1 (en) | 2009-08-04 | 2010-08-04 | Antenna Apparatus with Adaptive Polarization Switching Function |
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| TW099100265A TWI484696B (en) | 2010-01-07 | 2010-01-07 | Antenna apparatus with adaptive polarization switching function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007002273A2 (en) * | 2005-06-22 | 2007-01-04 | Knox Michael E | Antenna feed network for full duplex communication |
| US20080218424A1 (en) * | 2005-10-14 | 2008-09-11 | Blanton James L | Device and method for polarization control for a phased array antenna |
| US7593753B1 (en) * | 2005-07-19 | 2009-09-22 | Sprint Communications Company L.P. | Base station antenna system employing circular polarization and angular notch filtering |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007002273A2 (en) * | 2005-06-22 | 2007-01-04 | Knox Michael E | Antenna feed network for full duplex communication |
| US7593753B1 (en) * | 2005-07-19 | 2009-09-22 | Sprint Communications Company L.P. | Base station antenna system employing circular polarization and angular notch filtering |
| US20080218424A1 (en) * | 2005-10-14 | 2008-09-11 | Blanton James L | Device and method for polarization control for a phased array antenna |
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