200933981 九、發明說明： 【發明所屬之技術領域】 本發明係與可切換波束之八木天線相關，更詳而言 之，係為一種具有多樣化效益之可切換波束之八木天線及 其控制方法。 【先前技術】 按，常用之切換波束天線係由數組獨立之高增益天線 ❹和單極多投（Single_p〇le muHiple thr〇幻開關串接而 黪成，使射頻訊號經一單極多投開關連接到指向預設固定方 向之高增益天線；或者，如寄生式切換天線，由十數個天 線單元構成陣列，每一天線單元包含一單極天線，一微波 開關及一電抗負載零件。 【發明内容】 惟，利用習知利用單極多投開關來切換天線波束指 向，會因使用此串接之多投開關遭受十分可觀的功率損 ^耗，其功率損耗平均係大於h 5 dB ,且同時能承受大功率 OFDM (Orthogonal Frequency Division Multiplexing)^ 號之微波開關並不普及；另，該寄生式切換天線，不僅構 造複雜且製作難度及成本高，其每個天線單元上的開關， 因直接連接該天線和該板體，所以得承受更高額之電流， 同4，當波束數目增加時，該等天線單元彼此之距離減小， 相互藕合效應增加，而使其波束控制設計複雜度增高，又， 當以水平分開併列方式來擺置兩組切換波束天線以取得多 樣化增益（diversity gain)時，除了有兩組天線相互遮蔽 5 200933981 (bl〇cklng)問題外，所占用面積倍增，不符今日消費性電 子產品短小輕薄的要求。 本發明係提供一種可切換波束之八木天線及其控制方 法，、其係將數個可切換波束之八木天線以背對背垂直堆疊 方^，並使且該等可切換波束之八木天線彼此間的波束相 .互父錯構成，並藉由切換不同波束組合之可切換波束之八 木天線’而尋找出不同方向之可切換波束之八木天線其最 ❹佳波束組合，其中，該可⑽波束之人木天線主要係於一 響乡邊形狀之金屬材質之板體上，分別設置—用以接收及輕 射射頻訊號之驅動單元，與數個藉由控制器控制天線有效 電乳長度之波束控制單元，並於該驅動單元與該波束控制 單元之延伸軸方向再固定有數導波單元，藉此，控制該等 控制器而使該等可切換波束之八木天線傳輸及接收不同方 向射頻訊號，進而選擇產生最佳方向之可切換波束之八木 天線之波束組合。 ❿、树明所提供之—種可切換波束之人木天線及其控制 方法，該驅動單元係直接連接射頻裝置，而該等導波單元 和該等波束控制單元的一端係直接連接接於該板體，且該 波束控制單元上的控制器係設於開路端之位置，藉此，不 僅Z提升該切換波束八木天線組的最大承載功率，而且大 中田簡化所需射頻電路及控制器性能，該等可切換波束之八 j天線以波束交錯堆疊，不僅提供多樣化（diversity)功 月b ’同時，藉由比較不同波束組合所接收之射頻訊號強度， 而更快速尋找出最佳方向波束組合之射頻訊號來源。 6 200933981 【實施方式】 首先，請參閱第一至三圖所示，其係為本發明一種可 切換波束之八木天線之較佳實施例，其中，該可切換波束 之八木天線100係用背對背之堆疊方式而與另一可切換波 束之八木天線相互堆疊形成一可切換波束之八木天線組， ，使該切換波束八木天線組的各別輻射場圖彼此相互交錯並 產生部份重豐，藉此，該切換波束八木天線組其接收到射 ❿頻訊號間兼具有適量之方向角多樣化（angular diversity) 黪罾與相關性（correlation)，而所占用之面積小，並同時產 生倍增之波束數目，本發明較佳實施例之可切換波束之八 木天線組其每一可切換波束之八木天線1〇〇彼此係呈沾度 角度而上、下交錯排列，該可切換波束之八木天線1〇〇其 主要係包含有： 一板體10，係由金屬材質所組成，該板體並成形為一 多邊形狀’該多邊形狀之邊長數目係選自於由3、4、5、6、 ❿7或8所組成之群組之邊長數目，本發明較佳實施例之板體 1 〇其邊長數目係4，即為一正4邊形狀之板體1 〇。 一驅動單元20，係設於該板體1〇之中心位置，且該 驅動單元20固定於該板體1〇處，同時設有一訊號端21用 以連接一訊號線22 ’該訊號線22並再連接一射頻裝置 2〇〇，一輸入一射頻訊號而使該可切換波束之八木天線1〇〇 依指定方向產生波束’及依指定方向接收另一射頻訊號之 波束。 至少一波束控制單元3 0 ’係設於該驅動單元2 〇兩侧 7 200933981 之相對位置，其主要係直接在多層印刷電路板31製作有-天線段32、一控制器33及一天線延伸段34,該天線段32 與該天線延伸段34係直接印刷成形於該多層印刷電路板 31之金屬表面’且該天線段32 一端係電氣連接於該板體 0之金屬表面，另端則連接該控制器33，該控制器33相 對連接該天線段32之另端’則連接該天線延伸段34,且該 控制器33係用以控制該天線段32與該天線延伸段34是否 ❹產生電氣連接，該控制器33並連接有數控制線35，該控制 9 線35用以接收來自於該射頻裝置200所傳輸之控制訊號， 而該控制線35係設於該多層印刷電路板31之内層，並貫 穿該板體10且與該多層印刷電路板31金屬表面之天線段 32產生絕緣’本發明較佳實施例之控制器33係為一微波開 關，而該控制器32係可由PIN型二極體（pin diode)而組 成此微波開關’或由微波積體電路（M〇n〇lithicMicr〇wave200933981 IX. Description of the Invention: [Technical Field] The present invention relates to a Yagi antenna capable of switching beams, and more specifically, to a Yagi antenna having a diversified benefit of a switchable beam and a control method thereof. [Prior Art] Press, the commonly used switching beam antenna is composed of an array of independent high-gain antennas and a single-pole multi-drop (Single_p〇le muHiple thr singular switch), so that the RF signal is passed through a single-pole multi-switch Connected to a high-gain antenna pointing to a preset fixed direction; or, like a parasitic switching antenna, an array of ten antenna elements, each antenna unit comprising a monopole antenna, a microwave switch and a reactive load component. Content] However, the use of the unipolar multi-switch to switch the antenna beam pointing is subject to considerable power loss due to the use of this series of multi-switches. The average power loss is greater than h 5 dB and at the same time The microwave switch capable of withstanding high-power OFDM (Orthogonal Frequency Division Multiplexing) is not popular. In addition, the parasitic switching antenna is not only complicated in construction, but also difficult to manufacture and costly, and the switch on each antenna unit is directly connected. The antenna and the plate body are subjected to a higher current, and the distance between the antenna elements is increased when the number of beams is increased. Decrease, the mutual coupling effect increases, and the beam control design complexity increases. In addition, when two sets of switching beam antennas are arranged horizontally and side by side to obtain diversity gain, there are two groups. In addition to the problem of 200933981 (bl〇cklng), the occupied area doubles and does not meet the requirements of today's consumer electronics products. The present invention provides a switchable beam Yagi antenna and its control method, The Yagi antennas of the switchable beams are vertically stacked in a back-to-back manner, and the beam antennas of the switchable beams are mutually mutually misaligned, and the Yagi antennas of the switchable beams are switched by different beam combinations. 'Looking for the best beam combination of the Yagi antennas with different directions of the switchable beam, wherein the (10) beam of the human wood antenna is mainly on the metal plate of the shape of the township, respectively. a driving unit for receiving and transmitting radio frequency signals, and a plurality of beam control units for controlling the length of the electric milk by the controller, and A plurality of waveguide units are further fixed to the extending direction of the driving unit and the beam control unit, thereby controlling the controllers to transmit and receive RF signals in different directions by the Yagi antennas of the switchable beams, thereby selecting the most A beam combination of a Yagi antenna with a switchable beam in a good direction. 人, Shuming provides a human-earth antenna capable of switching beams and a control method thereof, the driving unit is directly connected to a radio frequency device, and the waveguide unit and One end of the beam control unit is directly connected to the board body, and the controller on the beam control unit is disposed at the open end position, thereby not only increasing the maximum carrying power of the switching beam Yagi antenna group, Moreover, Dazhongtian simplifies the required RF circuit and controller performance. The eight-j antennas of these switchable beams are stacked by beam, which not only provides diversity power b', but also compares the RF received by different beam combinations. Signal strength, and more quickly find the source of the RF signal for the best directional beam combination. 6 200933981 [Embodiment] First, please refer to the first to third figures, which is a preferred embodiment of a switchable beam Yagi antenna, wherein the switchable beam Yagi antenna 100 is used back to back. Stacking and stacking another switchable beam of Yagi antennas to form a switchable beam of Yagi antenna groups, so that the respective radiation field maps of the switched beam Yagi antenna group are mutually interlaced and partially rich. The switching beam Yagi antenna group has an appropriate angular diversity and correlation between the received and transmitted frequency signals, and the occupied area is small, and simultaneously generates a multiplied beam. The number of the Yagi antenna groups of the switchable beam according to the preferred embodiment of the present invention is that each of the switchable beams of the Yagi antennas 1 is arranged at an inclination angle to each other and is staggered up and down. The switchable beam of the Yagi antenna 1〇 The main body of the cymbal includes: a plate body 10, which is composed of a metal material, and the plate body is formed into a polygonal shape. From the number of sides of the group consisting of 3, 4, 5, 6, ❿7 or 8, the plate body 1 of the preferred embodiment of the present invention has a side length of 4, which is a positive 4-sided shape. Plate body 1 〇. A driving unit 20 is disposed at a center of the board body 1 , and the driving unit 20 is fixed to the board body 1 , and a signal terminal 21 is connected to connect a signal line 22 ' the signal line 22 and Then, an RF device is connected, and an RF signal is input to enable the Yagi antenna 1 of the switchable beam to generate a beam in a specified direction and to receive a beam of another RF signal in a specified direction. At least one beam control unit 30 0 is disposed at a relative position of the two sides 7 200933981 of the driving unit 2, which is mainly formed on the multilayer printed circuit board 31 with an antenna segment 32, a controller 33 and an antenna extension. 34. The antenna segment 32 and the antenna extension 34 are directly printed and formed on the metal surface of the multilayer printed circuit board 31. One end of the antenna segment 32 is electrically connected to the metal surface of the board body 0, and the other end is connected to the antenna segment 32. The controller 33 is connected to the other end of the antenna segment 32 to connect the antenna extension 34, and the controller 33 is used to control whether the antenna segment 32 and the antenna extension 34 are electrically connected. The controller 33 is connected to a plurality of control lines 35 for receiving control signals transmitted from the radio frequency device 200, and the control lines 35 are disposed on the inner layer of the multi-layer printed circuit board 31, and The controller segment 33 of the preferred embodiment of the present invention is insulated by an antenna segment 32 that penetrates the board body 10 and is electrically insulated from the metal surface of the multilayer printed circuit board 31. The controller 32 is a PIN type diode. (pin dio De) to form this microwave switch' or by microwave integrated circuit (M〇n〇lithicMicr〇wave
Integrated Circuit，MMIC)所組成此微波開關，更可藉 @ 由微電子機械系統（MEMS : Micro-Electro-Mechanical _ Systems)來組成此微波開關。 數導波單元40，係為金屬導體之材質所構成，並分別 固定於該板體10上，而與該板體1〇產生電氣連接，且該 等導波單元4 0係沿該驅動單元2 0與每一波束控制單元3 〇 所延伸之轴向排列設置，本發明較佳實施例之導波單元4〇 係為與板體10 —體且一起經沖模成型。 而該可切換波束之八木天線100及其堆疊而成之可切 換波束之八木天線組，並藉由一種可切換波束之八木天線 8 200933981 控制方法來控制該等可切換波束之八木天線丨〇〇，並藉由控 制該等可切換波束之八木天線1〇〇之波束控制單元3〇，來 比較該等可切換波束之八木天線100其所接收射頻訊號強 度平均值，而尋找出其接收射頻訊號最佳之方向，該可切 換波束之八木天線控制方法主要包含有： (a) 尋找最佳射頻訊號組合 依該可切換波束之八木天線1〇〇之設立位置其產生不 ❿同方向之波束依序給予編號’且經由最佳化運算而產生最 ❼ 佳波束組合之波束組合表，同時完成波束掃描，並讀取該 等波束組合之可切換波束之八木天線其接收到射頻訊號強 度平均值，同時由找出所接收射頻訊號強度平均值最高之 最佳波束組合，並將該最佳波束組合記為第a組，而其接 收射頻訊號之波束強度平均值則記為Pa，其中，波束組合 之最佳化運算係依給予該等可切換波束之八木天線1〇〇其 產生不同方向之波束之編號，其編號定義在整數集合 ❿ί 〇，1，2, . .，N-1}中，其中N係為該可切換波束之八木天線 Ο 100其產生不同方向波束之總數，而產生最佳波束組合編號 的加減運算為Ν模數（Modulo-N)之運算，即（Ν-1) + 1 = 0。 (b) 尋找次佳射頻訊號組合 依第a-1組及第a+1組之可切換波束之八木天線10 0 其接收射頻訊號之平均強度，分別記為Pa-Ι及pa+l，當 Pa+1大於pa-i，則設定b=a+l，反之則設定b=a-1。 (c) 計算k值 分別控制及切換該等可切換波束之八木天線100到第a 200933981 組及第b組之波束組合，同時量測該等波束組合接收之射 頻訊號強度平均值，各別記錄為Pa及pb，並計算k值如下； k=(Pa-Pb)/(Pa+Pb) ’ 如果無法接收到訊號’則回到步驟（a)。 (d) 決定射頻訊號方向 當k > +c/3時，如步驟（c)中b之值係為a+1 ,則再設 定b=a-l，否則設定b=aH ;當k〈 _c/3時，如步驟（c)中 ❹b之值係為a+i，則再設定a=b+1，否則設定卜1，其中， 馨 c值係介於1. 〇至1. 5間，並由Pa及pb的標準差最小值來 决疋c的值，藉此代表適量的延滯效果。 (e) 重複步驟（c)至（d)。 又，請參閱第七圖所示，其係為本發明又一較佳實施例 之可切換波束之八木天線1 00，而其主要結構及產生之功效 係與本發明較佳實施例相同，故不再贅述，其中，該可切 換波束之八木天線100更設有數支撐單元5〇，該等支撐單 ©元50並將該驅動單元20、該等波束控制單元3〇及該等導 波單το 40封裝固定該板體10上，而該支撐單元5〇係由介 電材料所組成，本發明較佳實施例之支撐單元5〇之介電材 料主要係選自由PVC、ABS或矽橡膠所組成之材料群組。 為供進一步瞭解本發明構造特徵、運用技術手段及所 預期達成之功效，茲將本發明使用方式加以敘述，相信當 可由此而對本發明有更深入且具體之瞭解，如下所述： 明參閱第三圖及第六圖所示，該可切換波束之八木天 線10 0係用为對背之堆疊方式與另一可切換波束之八木天 200933981 線100相互堆疊形成一可切換波束之八木天線組，因該可切 換波束之八木天線組係具有八個不同方向之波束，其N值係 為8，並依該可切換波束之八木天線控制方法之步驟（3)先 分別給予不同方向之波束編號係為^至⑽，而第五圖表示 經由N模數（Modulo-N)運算定義，分別給予該等波束組合之 編號係為0至7。Integrated Circuit (MMIC) is composed of this microwave switch, and the microwave switch can be composed of MEMS: Micro-Electro-Mechanical _ Systems. The plurality of waveguide units 40 are made of a material of a metal conductor, and are respectively fixed on the board body 10 to be electrically connected to the board body 1 , and the waveguide units 40 are along the driving unit 2 . 0 is arranged in an axial arrangement extending from each beam control unit 3, and the waveguide unit 4 of the preferred embodiment of the present invention is formed integrally with the plate body 10 and is die-molded together. And the switchable beam Yagi antenna 100 and its stacked switchable beam Yagi antenna group, and the Yagi antenna of the switchable beam is controlled by a switchable beam Yagi antenna 8 200933981 control method丨〇〇 And comparing the peaks of the received RF signals by the Yagi antenna 100 of the switchable beams by controlling the beam control unit 3〇 of the Yagi antennas of the switchable beams, and searching for the received RF signals. In the best direction, the control method of the Yagi antenna of the switchable beam mainly includes: (a) finding the optimal RF signal combination according to the set position of the Yagi antenna 1〇〇 of the switchable beam, which generates a beam according to the same direction. The beam combination table is given the number ' and the best combination of the beams is generated by the optimization operation, and the beam scanning is performed at the same time, and the Yagi antenna of the beam-switchable beam is read to receive the average of the RF signal strength. At the same time, the best beam combination with the highest average value of the received RF signal strength is found, and the optimal beam combination is recorded as the group a, The average beam intensity of the received RF signal is recorded as Pa, wherein the optimization of the beam combination is based on the number of the beam of the Yagi antenna that is given to the switchable beam, which generates different directions, and the number is defined. In the set of integers ❿ί 〇,1,2, . . , N-1}, where N is the switchable beam of the Yagi antenna Ο 100, which generates the total number of beams in different directions, and generates the addition and subtraction of the optimal beam combination number. For the modulo modulus (Modulo-N) operation, ie (Ν-1) + 1 = 0. (b) Finding the average intensity of the received radio frequency signals of the Yagi antennas 10 of the sub-group 1 and the a+1 group of switchable beams, which are recorded as Pa-Ι and pa+l, respectively. If Pa+1 is greater than pa-i, then b=a+l is set, otherwise b=a-1 is set. (c) Calculate the k-values to control and switch the beam combinations of the eight-beam antenna 100 of the switchable beams to the a 200933981 group and the b-th group, and measure the average of the RF signal strengths received by the beam combinations, respectively. For Pa and pb, and calculate the k value as follows; k=(Pa-Pb)/(Pa+Pb) ' If the signal cannot be received, then return to step (a). (d) When determining the direction of the RF signal when k > +c/3, if the value of b in step (c) is a+1, then set b=al, otherwise set b=aH; when k< _c/ 3之间, and, in the case of the step (c), the value of ❹b is a+i, then a=b+1 is set, and otherwise, the value of the c is between 1. 〇 to 1.5, and The value of c is determined by the minimum value of the standard deviation of Pa and pb, thereby representing an appropriate amount of retardation effect. (e) Repeat steps (c) through (d). Please refer to the seventh embodiment, which is a switchable beam Yagi antenna 100 according to another preferred embodiment of the present invention, and the main structure and the generated function are the same as the preferred embodiment of the present invention. The eight-earth antenna 100 of the switchable beam is further provided with a plurality of support units 5〇, and the support unit 20 and the drive unit 20, the beam control unit 3, and the guided waves τ. The package is fixed to the plate body 10, and the support unit 5 is composed of a dielectric material. The dielectric material of the support unit 5 of the preferred embodiment of the present invention is mainly selected from the group consisting of PVC, ABS or silicone rubber. Group of materials. In order to further understand the structural features, the technical means, and the intended effects of the present invention, the manner of use of the present invention will be described. It is believed that the present invention may be more deeply and specifically understood as follows: As shown in the third and sixth figures, the switchable beam Yagi antenna 100 is used to stack the back-to-back stack with another switchable beam of the Yagi day 200933981 line 100 to form a switchable beam of the Yagi antenna group. The Yagi antenna group of the switchable beam has eight beams in different directions, and the N value is 8, and according to the step (3) of the control method of the Yagi antenna of the switchable beam, the beam number systems in different directions are respectively given respectively. It is ^ to (10), and the fifth figure shows that the number assigned to the beam combinations is 0 to 7 respectively, as defined by the N-modulo (Modulo-N) operation.
請再參考第六圖所示，該可切換波束之八木天線控制 方法藉由控制該波束控制單元30之控制器33，而控制該天 線段32及延伸天線段34間是否射頻訊號斷開而感應對應之 波束，藉由相同之驅動單元2〇，及控制該波束控制單元 之控制器33而傳輸及接收不同方向之波束，本發明較佳實 施例中該天線段3 2及天線延伸段3 4間呈開路狀態時係以虛 線表示，並讀取此時波束組合之該等可切換波束之八木天 線1 〇〇其接收到射頻訊號強度平均值，並給予該等波束組合 之射頻訊號強度平均值對應之編號，即為PQ至ργ ;如步驟 (a)所述，依序切換該等可切換波束之八木天線1〇〇的波束 組合，並讀取在每一波束組合所接收到之射頻訊號強度平 均值’以完成全部波束組合之波束掃描工作，即可找出所 接收射頻訊號最強之波束組合。 假設射頻訊號之入射方向分布主要集中波束編號即附 近偏向波束編號D5，且該等可切換波束之八木天線1〇〇連接 之射頻裝置200僅讀取組合兩可切換波束之八木天線1〇〇其 所接收訊號後之射頻訊號強度（Received Signal strengthReferring to the sixth figure, the control method of the Yagi antenna of the switchable beam is controlled by controlling the controller 33 of the beam control unit 30 to control whether the RF signal is disconnected between the antenna segment 32 and the extended antenna segment 34. Corresponding beams are transmitted and received in different directions by the same driving unit 2 and the controller 33 controlling the beam control unit. In the preferred embodiment of the present invention, the antenna segment 3 2 and the antenna extension 3 4 The open-circuit state is indicated by a dotted line, and the Yagi antenna 1 of the switchable beams that are combined with the beam is read, and the average of the RF signal strengths is received, and the average of the RF signal strengths of the beam combinations is given. Corresponding numbers are PQ to ργ; as described in step (a), the beam combinations of the Yagi antennas of the switchable beams are sequentially switched, and the RF signals received in each beam combination are read. The intensity average 'to complete the beam scanning of all beam combinations can find the beam combination with the strongest received RF signal. It is assumed that the incident direction distribution of the RF signal mainly concentrates the beam number, that is, the nearby deflection beam number D5, and the radio frequency device 200 connected to the Yagi antenna of the switchable beam reads only the Yagi antenna that combines the two switchable beams. RF signal strength after received signal (Received Signal strength
Indicati〇n，RSSI)，而本發明較佳實施例之最佳波束組合 11 200933981 第Hgpa=4 ’其使用波束編號係為如及⑽，而其射頻 :號°己為P4 ’請再參考第五圖所示，當尋找出最佳波束組 口後再依步驟（b)尋找次佳射頻訊號組合，即取得第3組 及第5組之^束組合及其對應之平均接收射頻訊號強度記 P3^P5，虽射頻訊號強度P5大於射頻訊號強度P3時，則可 獲待b 5’因為波束編號D6在波束組合第4組與第5組為共用 之波束，且此上層波束編號D6介於下層波束編號D5和波束 ❹編號D7之間，並分別與此二波束有部分重疊，故可推斷入 射波之入射方向主要分布在波束編號⑽内；因此，持續量 測並比較在第4組及第5组之波束組合下其接收射頻訊號強 、、P可4貞人射波之主要人射方向何時移往波束編號 或波束編號D7;同時，隨時保有一波束涵蓋住主要入射波 以維持通訊訊號不中斷；因此，藉由計算k值可預測最佳之 波束組合方式來快速尋找該射頻訊號之方向，而避免過度 使用耗時的全部天線波束掃描。 © #由以上說明’可將本發明之優點與可達成功效整理 — 如下： 1'本P之可切換波束之人木天線及其控制方法，該驅 動単7L係直接接收-射頻訊號，或直接發射一射頻訊 號而不經由-串接單極多投開關及複雜天線饋電電 路’避免產生額外功率損耗。 2、本發明之可切換波束之人木天線及其控制方法，該控 制器係設於該等波束控制單元之開路端處，其所流經 的射頻電流較小，因此，該等控制器其最大承载功率 200933981 之要求相對較低，不僅降低生產成本，同時使該可切 換波束之八木天線組更適合承載較高之射頻功率，如 應用在0FDM之類具有高峰對平均比值（PApR)調變訊號 而不引起額外訊號失真。 〜 3、本發明之可切換波束之八木天線及其控制方法，該可 切換波束之八木天線其輸出訊號同時具有適量多樣化 (diversity)與相關性（correlati〇n) ’除了滿足所連 ❺ #之射頻裝置的多樣化需求，並藉由此相關性來比對 不同方向之可切換波束之八木天線其接收射頻訊號之 波束強度，而避免過度使用耗時的全部天線波束掃描 之方法，以提升該可切換波束之八木天線的波束切換 控制演算法則效率。 综上所述，本發明在同類產品中實有其極佳之進步實 用性，同時遍查國内外關於此類結構之技術資料，文 亦未發現有相同的構造存在在先，是以 發明專利要件，纽法提出中請。 准卩上所述者’僅係本發明之一較佳可行實施例而 瘗故舉凡應用本發明說明t及申請專利範圍所為之等效 、、、。構變化，理應包含在本發明之專利範圍内。 13 200933981 【圖式簡單說明】 第圖係本發明較佳實施例之可切換波束之八木天線 之立體示意圖。 第一圖係本發明較佳實施例之可切換波束之八木天線 組之頂視圖。 第二圖係本發明較佳實施例之可切換波束之八木天線 組之侧視圖。 〇 第四圖係本發明較佳實施例之可切換波束之八木天線 魯 控制方法流程圖。 第五圖係本發明較佳實施例之可切換波束之八木天線 波束組合圖。 第六圖係本發明較佳實施例之可切換波束之八木天線 之動作示意圖。 第七圖係本發明又一較佳實施例之可切換波束之入木 天線之立體示意圖 ❹【主要元件符號說明】 ® 【本發明】 100 可切換波束之八木天線 10 板體 20 驅動單元 21 訊號端 22 訊號線 30 波束控制單元 31 多層印刷電路板 32 天線段 33 控制器 34 天線延伸段 35 控制線 200933981 40 導波單元 50 支#單元 200 射頻裝置Indicati〇n, RSSI), and the preferred beam combination 11 of the preferred embodiment of the present invention 200933981 Hgpa=4 'the beam number is used as (10), and its radio frequency: number ° is P4 'Please refer to In the five figures, after finding the best beam group port and then searching for the second best RF signal combination according to step (b), the combination of the third group and the fifth group and the corresponding average received RF signal strength record are obtained. P3^P5, although the RF signal strength P5 is greater than the RF signal strength P3, it can be obtained as b 5' because the beam number D6 is the beam shared by the beam combination group 4 and group 5, and the upper layer beam number D6 is between The lower beam number D5 and the beam ❹ number D7 are partially overlapped with the two beams respectively, so it can be inferred that the incident direction of the incident wave is mainly distributed in the beam number (10); therefore, the continuous measurement and comparison are in the fourth group and In the beam combination of Group 5, it receives the RF signal strong, and the main human beam direction of P can be moved to the beam number or beam number D7; at the same time, a beam is covered at all times to cover the main incident wave to maintain communication. The signal is not interrupted; therefore By calculating the k value, the best beam combining method can be predicted to quickly find the direction of the RF signal, and avoid excessive use of time-consuming full antenna beam scanning. © # The above description can be used to align the advantages and achievable functions of the present invention as follows: 1' The P-switchable beam of the human-wood antenna and its control method, the drive 単7L is directly receiving - RF signal, or directly Emission of an RF signal without cross-connecting single-pole multi-drop switches and complex antenna feed circuits 'avoids additional power loss. 2. The human-wood antenna of the switchable beam of the present invention and a control method thereof, the controller is disposed at an open end of the beam control unit, and the RF current flowing through the controller is small, and therefore, the controllers thereof The requirement of the maximum carrying power 200933981 is relatively low, which not only reduces the production cost, but also makes the switchable beam Yagi antenna group more suitable for carrying higher RF power, such as peak-to-average ratio (PApR) modulation applied in 0FDM. The signal does not cause additional signal distortion. ~ 3, the Yagi antenna of the switchable beam of the present invention and the control method thereof, the output signal of the switchable beam of the Yagi antenna has a proper amount of diversity and correlation (correlati〇n) 'In addition to satisfying the connection # The diverse needs of the RF device, and by this correlation, the Yagi antenna of the switchable beam in different directions can receive the beam intensity of the RF signal, thereby avoiding excessive use of the time-consuming method of all antenna beam scanning to improve The beam switching control algorithm of the Yagi antenna of the switchable beam is efficient. In summary, the present invention has excellent advancement and practicability in similar products, and at the same time, the technical materials of such structures are frequently investigated at home and abroad, and the same structure is not found in the prior art, and the invention patent is The essentials, Newfa proposed in the request. The above description is only a preferred embodiment of the present invention, and is intended to be equivalent to the application of the present invention and the scope of the patent application. The structural changes are intended to be included in the scope of the patent of the present invention. 13 200933981 BRIEF DESCRIPTION OF THE DRAWINGS The figure is a perspective view of a Yagi antenna of a switchable beam in accordance with a preferred embodiment of the present invention. The first figure is a top view of a Yagi antenna group of switchable beams in accordance with a preferred embodiment of the present invention. The second figure is a side view of a Yagi antenna group of a switchable beam in accordance with a preferred embodiment of the present invention. The fourth figure is a flow chart of the control method of the Yagi antenna rouble of the switchable beam according to the preferred embodiment of the present invention. The fifth figure is a beam combination diagram of a Yagi antenna of a switchable beam according to a preferred embodiment of the present invention. The sixth figure is a schematic diagram of the operation of the Yagi antenna of the switchable beam according to the preferred embodiment of the present invention. 7 is a perspective view of a switchable beam into a wooden antenna according to another preferred embodiment of the present invention. [Main component symbol description] ® [Invention] 100 switchable beam Yagi antenna 10 board 20 drive unit 21 signal Terminal 22 Signal Line 30 Beam Control Unit 31 Multilayer Printed Circuit Board 32 Antenna Section 33 Controller 34 Antenna Extension 35 Control Line 200933981 40 Guided Wave Unit 50 Branch #Unit 200 RF Device