1238561 攻、發明說明： 【發明所屬之技術領域】 本發明係關於一種寬頻圓極化環型微帶天線，特別是指 種％型堆疊式微帶貼片天線及用於圓極化之微帶貼片天 線。 【先前技術】 在無.線電設備中凡是利用電磁波來傳遞信息的包括：無 線電通信、廣播、電視、雷達、導航、遙測、遙感、射電天 文、電子對抗等工程系統，都依靠天線來進行工作。以無線 電通信系統為例，從發射機輸出的高頻功率經傳輸線導送到 發射天線，發射天線將高頻功率變換成空間的輻射波；在接 收编，接收天線將入射的空間電磁波變換成高頻導波，再經 傳輸線導送到接收機。因此，天線可以說是導波和空間波的 變換裝置。 然隨著無線通訊之逢薄發展，其相關之通訊產品也曰趨 多樣化，大多數的當前全球定位衛星（GpS)接收器典型操作 為使用圓形極化天線，傳統螺旋型天線（HeHcal Antenna) 能產生圓極化電場，該型天線之相關特性亦屬相當優異，但 此種天線為柱狀結構設計，天線體積略嫌粗重，一般設計之 微帶貼片圓極化天線雖解決螺型天線之粗重問題，但其阻抗 頻寬及3-dB圓極化軸比通常非常窄。 1238561 由此可見，上述習用物品仍有諸多缺失，有必要提供一 種創新且體積輕薄之環型圓極化微帶天線，以解決上述問 題。 本案發明人鑑於上述習用微帶貼片圓極化天線所衍生的 各項缺點，乃亟思加以改良創新’並經多年苦心孤詣潛心研 究後，終於成功研發完成本件寬頻圓極化環型微帶天線。 【發明目的】 本發明之目的即在於提供一種寬頻圓極化環型微帶天 線，係利用微帶貼片天線能直接經由相同之平面上或在接地 平面上’用同軸探針方式饋電，經由選定之適當點餽入信號 使環型開口微帶輻射器產生圓形圓極化電磁波。 本务月之—人目的係在於提供一種環型開口微帶輕射器 作為寬頻圓極化天線，係在環型開口微帶輕射器上，經由連結 線於適當點餽入信號以激勵產生相位差90度之等振幅電 %，圓形極化輻射電磁波。 發月之另 目的係在於提供一種平面矩型微帶與圓柱 導體組成阻抗轉換器，能有效增大阻抗頻寬，此種結構之阻 轉換器有別於傳統阻抗轉換器採用四分之一波長之做 相車乂於其他饋線技術有一些令人嚮往之特色。 本發日月之X — ν 目的係在於提供一種寬頻圓極化環型微帶 1238561 天線能有較寬之阻抗頻寬或3dB軸比頻寬的圓極化微帶天 線，以克服傳統利用微帶產生圓極化天線設計所產生應用於 很窄頻寬之限制。 本發明之再一目的係在於提供一種寬頻圓極化環型微帶 天線’係在於提供一種能有較高天線效率與較高之天線圓極 化增益，應用本發明之圓極化天線可獲得體積輕薄短小之寬 頻南增益之優點。 【發明内容】 可達成上述發明目的之寬頻圓極化環型微帶天線，包括 有： FR4印刷電路板’係為厚度ι·6 mm介電常數為4.4 (F/m)之微波用電路板，該FR4印刷電路板上鑲有厚度〇 〇〇2 _之導電金屬，利用該導電金屬蝕刻一矩形微帶轉換器A、 一矩形微帶轉換器B及一矩形微帶轉換器c，包括有··一饋 入點’係與矩形微帶轉㈣氣連名吉，為信號輸入或輸 出2車；一矩形微帶轉換器c，係提供後述之環型開口微帶輻 射器，連接線與矩形微帶轉換器A作電氣連結；三矩形微帶 、器係為一組不同寬度之餘刻微帶，利用這三組不同寬 ^之轉換器與連接線構成阻抗轉換器，與上層之環型開口微 帶轄射器進衧阻抗匹配； R〇 p刷電路板，係厚度為〇· 介電常數為&⑽ (F/m)之镞波用電路板，該R〇印刷電路板上鑲有一厚度〇· ⑽導電金屬利用忒導電金屬蝕刻一具有切口間隙金屬體 之環型開口微帶輻射器，該環型開口微帶輻射器之規格為内 1238561 徑略小於-波長，寬度為適當之環型開口金屬體，該環型開 口金屬體於適當位置截斷一適當寬度之切口間隙，該切口間 隙的寬度為4 mm，利用該切口間隙使環型開口微帶輻射器產 生圓極化之電場，構成圓極化天線之功效；以及 、^ 一連接線，係提供將上層R〇印刷電路板之環型開口微帶 輻射器與下層FR4印刷電路板之矩形微帶轉換器A、矩形微 帶轉換器B及矩形微帶轉換器c隔離，該連接線採用約3:;5 倍波長之長度的1 · e mm之圓柱實心導線。 【實施方式】 「請參閱圖…二」，本發明所提供之寬頻圓極化環型微 帶天線1，主要包括有：一 FR4印刷電路板18、一 R0印刷 電路板1 7及一連接線1 6所組成。 一 FR4印刷電路板18’係為厚度16_介電常數為44 (F/m)之微波用高感度印刷電路板，該FR4印刷電路板a上 鑲有厚度0.002 _之導電金屬，利用該導電金屬蝕刻一矩 形微帶轉換器A13、一矩形微帶轉換器B14及一矩形微帶轉 換器C12,包括有：一饋入點15,係與矩形微帶轉換器βΐ4 作電氣連結，為信號輸入或輸出埠；—矩形微帶轉換器c12 (請參閱圖四）’係提供後述之環型開口微帶輻射器u經連 接線16與矩形微帶轉換器A13作電氣連結’由圖四可得知 矩形微帶轉換器C12之矩形微帶轉換器c寬度121與矩形微 帶轉換器C長度122 ;另，二矩形微帶轉換器，係為兩組不 同寬度之蝕刻微帶，其矩形微帶轉換器A長度132與矩形微 帶轉換S B長纟H2可以相同’但接近饋人點15之矩形微 帶轉換器B14其寬度必然較另一矩形微帶轉換器A13寬，也 就是矩形微帶轉換器B寬度141比矩形微帶轉換器A寬度131 較寬，以符合阻抗匹配；利用^這三組不同寬度矩形微帶與連 1238561 • « 接線1 6構成阻抗轉換器，與上層之環型開口微帶輻射 進行阻抗匹配（請參閱圖五、六）； ° ， 一 印刷電路板17,係厚度為〇·5〇8麵介電常數為 3·38 〇Vm)之微波用高感度印刷電路板，該r〇印刷電路板 Π上鑲有一厚度〇 〇〇2 _之導電金屬，利用該導電金屬蝕 刻具有切口間隙11 3之環型金屬體之環型開口微帶輻射器 U (請參閱圖三），該環型開口微帶輻射器u為内徑112略 ^於一波長，外徑為較内徑多一適當寬度之環型金屬體，該 %型金屬體於適當位置截斷一適當寬度之切口間隙11 3，利 用該切口間隙113使環型微帶輻射器產生圓極化 成圓極化天線之功效；以及 電⑦構籲 一連接線16,係提供將上層R0印刷電路板17之環型開 口微帶輻射器11與下層FR4印刷電路板18之一矩形微帶轉 換器Α13、一矩形微帶轉換器Β14及一矩形微帶轉換器c12 隔離’該連接線16採用約3.15倍波長之長度的丨_6 mm之 圓柱實心導線（請參閱圖七）。 本發明係在於提供一種寬頻圓極化環型微帶天線能有 鲁 較寬之阻抗頻寬或3dB軸比頻寬的圓極化微帶天線，以克服 傳統利用微帶產生圓極化天線設計所產生應用於很窄頻寬 之限制。本發明係利用微帶貼片天線黏貼在背面有導體接地 板的介質基片上而形成的天線，並通過由矩形貼片天線 (例·矩形微帶轉換器A13、矩形微帶轉換器B14 )和圓形 貼片天線（例：環型開口微帶輻射器11 )四周提供線性極化， 11 1238561 利用環型開口微帶輪射器1 1產生圓極化電磁波向外輻射。 「上 請參閱圖八」為本發明之寬頻圓極化環型微帶天線之 反射返回損失R· L( Re turn Loss)，係以2· 1 GHz為設計操作 頻率在R· — i〇 dB以下之阻抗頻寬約8· 5%之示意圖，「圖 九」為本發明之史密斯阻抗圓圖，「圖十」為本發明之寬頻 圓極化環型微帶天線之駐波比與頻率之關係圖。 本發明利用連接線1 6將上層之環型開口微帶輻射器J ^ 與下層之矩形微帶轉換器C12及一矩形微帶轉換器AM、一 矩形U V轉換器β 14作電器連結，並以空氣為介質隔離適當 間距，其隔離間距為3.15波長之空氣隙，透過將上層之環 型開口微帶輻射器U與下層之矩形微帶轉換器α2及一矩 形微帶轉換器A13、一矩形微帶轉換器B14隔離，並採用兩 種不同介電係數之微帶印刷電路板之組裝技術，明顯增大微 帶天線設計為圓極化時的3 dB窄頻軸比之瓶頸，由「圖十 一」中可得知本發明之寬頻圓極化環型微帶天線的軸比對頻 率之關係圖。 本發明所利用之連接線 1 6除了能將上層之環型開口微 帶輕射器11與下層之矩形微帶轉換器G12及—矩形微帶轉 換器A13、-矩形微帶轉換器B14隔離外，經由正確設計三 組矩形微帶轉換器與連接線 16之規袼，使與上層環型開口 12 1238561 微帶輪射器11阻抗匹配’能明顯提升微帶天線之輕射效率 /、天線效率，由「圖十二、十三」中可得知本發明之寬頻圓 極化壞型微帶天線之輻射效率與天線效率與頻率之關係 圖，在2.1GHz之設計操作頻率時其輻射效率約85%，天線效 率約81%。 【特點及功效】 本發明所提供之寬頻圓極化環型微帶天線，與前述引證 案及其他習用技術相互比較時，更具有下列之優點： (1)本發明係利用連接線以空氣為介質將上層之環型開 D微帶輕射器與下層之矩形微帶轉換器A、矩形微帶轉換器 β及矩形微帶轉換器C隔離適當間距，並採用兩種不同介電 係數之微帶印刷電路板’明顯增大微帶天線設計為圓極化時 的3 dB窄頻軸比之瓶頸。 ο)本發明戶斤利用之連接線能將上層之環型開口微帶輻 射器與下層之矩形微帶轉換器A、矩形微帶轉換器B及矩形 城帶轉換H G關，明顯提升本發明之寬頻圓極化環型微帶 天線之輕射效率與天線效率，於2.1GHz之設計操作頻率時 其輻射效率約85%，天線效率約81%。 上列詳細說明係針對本發明之一可行實施例之具體說 明’惟該實施例並非用以限制本發明之專利範圍，凡未脫離 13 ^238561 爲 爾 1明技藝精神所為之等效實施或變更，均應包含於本案之 專利範圍中。 ‘上所述，本案不但在技術思想上確屬創新，並能較習 用物品增進上述多項功效，應已充分符合新穎性及進步性之 法定發明專利要件，爰依法提出申請，懇請貴局核准本件 發明專利申請案，以勵發明，至感德便。 【圖式簡單說明】 請參閱以下有關本發明一較佳實施例之詳細說明及其附 參 圖’將可進一步瞭解本發明之技術内容及其目的功效；有關 該實施例之附圖為： 圖一為本發明寬頻圓極化環型微帶天線之頂視圖； 圖二為該寬頻圓極化環型微帶天線之立體側視圖； 圖三為該環型開口微帶輻射器之示意圖； 圖四為該寬頻圓極化環型微帶天線之矩形微帶轉換器c ^ 之示意圖； 圖五為該寬頻圓極化環型微帶天線之矩形微帶轉換器A 之示意圖； 圖六為該寬頻圓極化環型微帶天線之矩形微帶轉換器B 之示意圖； 圖七為該寬頻圓極化環型微帶天線之連接線之示意圖； 14 1238561 圖八為該寬頻圓極化環型微帶天線之返回損失（η Loss)圖； 圖九為該寬頻圓極化環型微帶天線之史密斯圖（sm i Chart); 圖十為該寬頻圓極化環型微帶天線之駐波比與頻率之關 係圖； 圖十一為該寬頻圓極化環型微帶天線之軸比與頻率之關 係圖； 圖十二為該寬頻圓極化環型微帶天線之天線效率與頻率 之關係圖；以及 圖十三為該寬頻圓極化環型微帶天線之圓極化與頻率之 關係圖。 【主要部分代表符號】 1寬頻圓極化環型微帶天線 11環型開口微帶輻射器 111外徑 112内徑 113切口間隙 12矩形微帶轉換器c 121矩形微帶轉換器c寬度 15 1238561 122矩形微帶轉換器C長度 .1238561 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a wideband circularly polarized loop microstrip antenna, in particular to a% -type stacked microstrip patch antenna and a microstrip patch for circular polarization. Patch antenna. [Previous technology] In non-wired equipment, all systems that use electromagnetic waves to transmit information include: radio communication, broadcasting, television, radar, navigation, telemetry, remote sensing, radio astronomy, electronic countermeasures and other engineering systems that rely on antennas to work . Taking a radio communication system as an example, the high-frequency power output from the transmitter is guided to the transmitting antenna via the transmission line, and the transmitting antenna converts the high-frequency power into a radiating wave in space. In the receiving code, the receiving antenna converts the incident space electromagnetic wave into a high The frequency guided wave is guided to the receiver via the transmission line. Therefore, the antenna can be said to be a conversion device for guided waves and space waves. However, with the development of wireless communication, its related communication products are becoming more diversified. Most of the current global positioning satellite (GpS) receivers typically operate using circularly polarized antennas, and traditional spiral antennas (HeHcal Antenna ) Can generate a circularly polarized electric field, and the relevant characteristics of this type of antenna are also quite excellent, but this antenna is designed with a cylindrical structure, and the antenna volume is slightly heavy. Although the general design of a microstrip patch circularly polarized antenna solves the spiral type The antenna is heavy, but its impedance bandwidth and 3-dB circular polarization axis ratio are usually very narrow. 1238561 It can be seen that there are still many shortcomings in the above-mentioned conventional articles. It is necessary to provide an innovative and thin circular circular polarized microstrip antenna to solve the above problems. In view of the various shortcomings derived from the conventional microstrip patch circular polarization antenna described above, the inventor of this case has been eager to improve and innovate. After years of painstaking research, he has successfully developed this wideband circularly polarized loop microstrip antenna. . [Objective of the Invention] The purpose of the present invention is to provide a wideband circularly polarized loop type microstrip antenna, which uses a microstrip patch antenna to feed directly through the same plane or on the ground plane using a coaxial probe. The signal is fed through a proper point selected to cause the circular-opening microstrip radiator to generate circularly polarized electromagnetic waves. The purpose of this month is to provide a ring-opened microstrip light emitter as a wideband circularly polarized antenna. It is attached to the ring-opened microstrip light emitter and feeds signals at appropriate points through the connection line to stimulate the generation. The phase amplitude is 90% and the amplitude is equal to the electrical percentage. The circular polarization radiates electromagnetic waves. The other purpose of Fayue is to provide an impedance converter composed of a flat rectangular microstrip and a cylindrical conductor, which can effectively increase the impedance bandwidth. The resistance converter of this structure is different from the traditional impedance converter using a quarter wavelength There are some desirable characteristics of the other car feeder technology. The purpose of this issue is to provide a circularly polarized microstrip antenna with a wide-band circularly polarized ring-shaped microstrip 1238561. The antenna can have a wide impedance bandwidth or 3dB axial ratio bandwidth to overcome the traditional use of microstrip antennas. The band-generating circularly polarized antenna design has limitations that apply to very narrow bandwidths. Another object of the present invention is to provide a wideband circularly polarized loop microstrip antenna. The purpose is to provide a antenna with higher antenna efficiency and higher circular polarization gain. The advantages of light, thin and short wide-band South gain. [Summary] A broadband circularly polarized loop-type microstrip antenna capable of achieving the above-mentioned object of the invention includes: FR4 printed circuit board is a microwave circuit board having a thickness of 6 mm and a dielectric constant of 4.4 (F / m). The FR4 printed circuit board is inlaid with a conductive metal having a thickness of 0.002 mm. The conductive metal is used to etch a rectangular microstrip converter A, a rectangular microstrip converter B, and a rectangular microstrip converter c, including: ·· A feed point 'is connected to a rectangular microstrip and is connected to a famous car, which is a signal input or output 2 cars; a rectangular microstrip converter c is to provide a ring-shaped opening microstrip radiator described below, connecting the line and a rectangle The microstrip converter A is electrically connected; the three-rectangular microstrip and the device are a set of microribbons with different widths. The three sets of converters and connection lines with different widths are used to form an impedance converter, which is connected to the upper ring. The open microstrip transmitter has impedance matching; R0p is a printed circuit board with a thickness of 0 · and a dielectric constant of & ⑽ (F / m). The R0 printed circuit board is embedded with Has a thickness of 0 · ⑽ conductive metal using 忒 conductive metal to etch a gold with a notch gap The ring-shaped opening microstrip radiator of the metal body, the size of the ring-shaped opening microstrip radiator is inner 1238561, the diameter is slightly smaller than the -wavelength, and the width is an appropriate ring-shaped opening metal body. The ring-shaped opening metal body is truncated at an appropriate position. An incision gap of an appropriate width, the width of the incision gap is 4 mm, and the incision gap is used to generate a circularly polarized electric field of the ring-shaped opening microstrip radiator to form the effect of a circularly polarized antenna; It is to provide the ring-shaped opening microstrip radiator of the upper layer R0 printed circuit board and the rectangular microstrip converter A, rectangular microstrip converter B and rectangular microstrip converter c of the lower FR4 printed circuit board. The connection line uses A cylindrical solid wire of 1 · e mm with a length of about 3: 5 wavelengths. [Embodiment] "Please refer to the figure ... 2", the broadband circularly polarized loop microstrip antenna 1 provided by the present invention mainly includes: a FR4 printed circuit board 18, a R0 printed circuit board 17 and a connecting line Composed of 1 to 6. A FR4 printed circuit board 18 'is a microwave high-sensitivity printed circuit board with a thickness of 16_ and a dielectric constant of 44 (F / m). The FR4 printed circuit board a is embedded with a conductive metal having a thickness of 0.002_. Metal etching a rectangular microstrip converter A13, a rectangular microstrip converter B14, and a rectangular microstrip converter C12, including: a feed point 15, which is electrically connected to the rectangular microstrip converter βΐ4 for signal input Or output port; —rectangular microstrip converter c12 (see Figure 4) 'is provided with a ring-shaped opening microstrip radiator u to be described later electrically connected to the rectangular microstrip converter A13 via a connection line 16' can be obtained from Figure 4 Know the rectangular microstrip converter c12 of the rectangular microstrip converter c width 121 and the rectangular microstrip converter C length 122; In addition, the two rectangular microstrip converters are two sets of etched microstrips with different widths. The length A of the converter A and the length of the rectangular microstrip converter SB may be the same as the length of SB H2. However, the width of the rectangular microstrip converter B14 which is close to the feeding point 15 must be wider than that of another rectangular microstrip converter A13, that is, the rectangular microstrip conversion. B width 141 is wider than rectangular microstrip converter A 131 Wide to comply with impedance matching; ^ these three sets of rectangular microstrips of different widths are used to connect 1238561 • «Wiring 1 6 to form an impedance converter for impedance matching with the upper ring-shaped open microstrip radiation (see Figures 5 and 6) °, a printed circuit board 17, is a microwave high-sensitivity printed circuit board with a thickness of 0.58 (dielectric constant of 3.38 volts) and a thickness of 0.000 is embedded on the printed circuit board Π. 〇2 _ conductive metal, use this conductive metal to etch a ring-shaped opening microstrip radiator U (see Figure 3) of a ring-shaped metal body with a notch gap 11 3, the ring-shaped opening microstrip radiator u is the inner diameter 112 is slightly at a wavelength, and the outer diameter is a ring-shaped metal body with an appropriate width more than the inner diameter. The% -type metal body cuts a notch gap of an appropriate width 11 3 at an appropriate position, and uses the notch gap 113 to make the ring shape slightly smaller. The function of a circular polarized antenna with a radiator to create a circularly polarized antenna; and the electrical structure of a connection line 16 is provided to provide a ring-shaped opening microstrip radiator 11 on the upper layer R0 printed circuit board 17 and a lower layer FR4 printed circuit board 18 A rectangular microstrip converter A13, a rectangular Β14 baseband converter and a rectangular microstrip converter c12 isolate 'the connection line 16 employs a cylindrical solid conductor Shu _6 mm of length of about 3.15 times the wavelength (see Figure 7). The present invention is to provide a circularly polarized microstrip antenna with a wide-band circularly polarized loop-type microstrip antenna that can have a wide impedance bandwidth or 3dB axial ratio bandwidth to overcome the traditional design of circularly polarized antennas using microstrips. The resulting restrictions apply to very narrow bandwidths. The present invention is an antenna formed by pasting a microstrip patch antenna on a dielectric substrate with a conductive ground plate on the back, and passing a rectangular patch antenna (e.g., rectangular microstrip converter A13, rectangular microstrip converter B14) and A circular patch antenna (for example: a ring-shaped opening microstrip radiator 11) provides linear polarization around it. 11 1238561 Uses a ring-shaped opening microstrip radiator 1 1 to generate circularly polarized electromagnetic waves to radiate outward. "Please refer to Fig. 8" is the reflection return loss R · L (Re turn Loss) of the wideband circularly polarized loop microstrip antenna of the present invention, which is designed with 2.1 GHz as the operating frequency at R · — i〇dB The following is a schematic diagram of the impedance bandwidth of about 8.5%. "Figure 9" is the Smith impedance circle chart of the present invention, and "Figure 10" is the standing wave ratio and frequency of the wideband circularly polarized loop microstrip antenna of the present invention. relation chart. The present invention uses a connecting line 16 to connect the upper ring-shaped open microstrip radiator J ^ to the lower rectangular microstrip converter C12, a rectangular microstrip converter AM, and a rectangular UV converter β 14 as electrical appliances, and Air is a medium with a proper spacing. The isolation gap is an air gap of 3.15 wavelengths. Through the ring-shaped opening microstrip radiator U on the upper layer and the rectangular microstrip converter α2 and the rectangular microstrip converter A13, a rectangular microstrip With the converter B14 isolation and the use of two kinds of microstrip printed circuit board assembly technologies with different dielectric coefficients, the bottleneck of the 3 dB narrowband axial ratio when the microstrip antenna is designed to be circularly polarized is significantly increased. "A" shows the relationship between the frequency of the axial ratio of the broadband circularly polarized loop microstrip antenna of the present invention. The connecting wire 16 used in the present invention can isolate the upper ring-shaped open microstrip light emitter 11 from the lower rectangular microstrip converter G12 and the rectangular microstrip converter A13 and the rectangular microstrip converter B14. By correctly designing three sets of rectangular microstrip converters and connecting wires 16, the impedance matching with the upper ring opening 12 1238561 microstrip revolver 11 can significantly improve the light emission efficiency of the microstrip antenna, and antenna efficiency. From "Figures 12 and 13," the relationship between the radiation efficiency of the broadband circularly polarized microstrip antenna of the present invention, the antenna efficiency, and the frequency can be obtained. The radiation efficiency at the designed operating frequency of 2.1 GHz is about 85%, antenna efficiency is about 81%. [Features and effects] The broadband circularly polarized loop microstrip antenna provided by the present invention has the following advantages when compared with the aforementioned citations and other conventional technologies: (1) The present invention utilizes air as the connection line. The medium isolates the ring-shaped open D microstrip light emitter on the upper layer from the rectangular microstrip converter A, rectangular microstrip converter β, and rectangular microstrip converter C on the lower layer at an appropriate distance, and uses two different dielectric constants. With a printed circuit board 'significantly increases the bottleneck of the 3 dB narrowband axial ratio when the microstrip antenna is designed for circular polarization. ο) The connection cable used by the householder of the present invention can convert the upper ring-shaped opening microstrip radiator and the lower rectangular microstrip converter A, rectangular microstrip converter B, and rectangular city belt to HG, which significantly improves the invention. The light emission efficiency and antenna efficiency of the broadband circularly polarized loop microstrip antenna are about 85% and the antenna efficiency is about 81% at the designed operating frequency of 2.1GHz. The above detailed description is a specific description of one of the feasible embodiments of the present invention, but this embodiment is not intended to limit the scope of the patent of the present invention, and any equivalent implementation or change that does not depart from the technical spirit of 13 ^ 238561 Shall be included in the patent scope of this case. 'As mentioned above, this case is not only technically innovative, but also enhances the above-mentioned multiple effects over conventional items. It should have fully met the requirements for novel and progressive statutory invention patents, and applied for it in accordance with the law. We ask your office to approve this. Application for invention patents, to encourage invention, to the utmost. [Brief description of the drawings] Please refer to the following detailed description of a preferred embodiment of the present invention and its accompanying drawings' to further understand the technical content of the present invention and its purpose and effect; the drawings related to this embodiment are: One is a top view of the wideband circularly polarized loop microstrip antenna of the present invention; FIG. Two is a perspective side view of the wideband circularly polarized loop microstrip antenna; FIG. Three is a schematic view of the ring-shaped open microstrip radiator; 4 is a schematic diagram of a rectangular microstrip converter c ^ of the broadband circularly polarized loop microstrip antenna; Figure 5 is a schematic diagram of a rectangular microstrip converter A of the broadband circularly polarized loop microstrip antenna; Schematic diagram of the rectangular microstrip converter B of the broadband circularly polarized loop microstrip antenna; Figure 7 is a schematic diagram of the connection line of the broadband circularly polarized loop microstrip antenna; 14 1238561 Figure 8 is the broadband circularly polarized loop antenna Η Loss diagram of the microstrip antenna; Figure 9 is the sm i Chart of the broadband circularly polarized loop microstrip antenna; Figure 10 is the standing wave of the broadband circularly polarized loop microstrip antenna The relationship between the ratio and the frequency; Figure 11 is the width Figure 12 shows the relationship between the axial ratio and frequency of a circularly polarized loop microstrip antenna; Figure 12 shows the relationship between the antenna efficiency and frequency of the wideband circularly polarized loop microstrip antenna; and Figure 13 shows the wideband circular pole Relationship between circular polarization and frequency of a loop-type microstrip antenna. [Representative symbols of main parts] 1 Broadband circularly polarized loop microstrip antenna 11 Loop open microstrip radiator 111 outer diameter 112 inner diameter 113 notch gap 12 rectangular microstrip converter c 121 rectangular microstrip converter c width 15 1238561 122 rectangular microstrip converter C length.
1 3矩形微帶轉換器A 1 31矩形微帶轉換器A寬度 、 132矩形微帶轉換器A長度 14矩形微帶轉換器B 141矩形微帶轉換器B寬度 142矩形微帶轉換器B長度 1 5饋入點 Φ 1 6連接線 17 R0印刷電路板 18 FR4印刷電路板1 3 rectangular microstrip converter A 1 31 rectangular microstrip converter A width, 132 rectangular microstrip converter A length 14 rectangular microstrip converter B 141 rectangular microstrip converter B width 142 rectangular microstrip converter B length 1 5feed point Φ 1 6 connecting line 17 R0 printed circuit board 18 FR4 printed circuit board
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