【摘要】：近年來，隨著無線通信技術(shù)的飛速發(fā)展，無線鍵盤產(chǎn)品迅速推出和更新，需求量越來越大。為了保證其質(zhì)量，必須制造出合適的量產(chǎn)測試系統(tǒng)。常規(guī)的現(xiàn)場測試系統(tǒng)測試模板由分立元件構(gòu)成的，其高頻一致可控性差，而導(dǎo)致測試不確定性增加；同時(shí)平面布置的測試模板會(huì)對(duì)外產(chǎn)生干擾，而引起的測試空間占用過大的問題。本文主要針對(duì)上述兩個(gè)問題，設(shè)計(jì)了有特色的無線鍵盤現(xiàn)場測試系統(tǒng)。 該系統(tǒng)中測試模板中采用了自主設(shè)計(jì)的三端口衰減器，該衰減器在利用耦合器作衰減器的基礎(chǔ)上巧妙地利用PCB的損耗特性，使多余的信號(hào)能量在板間消耗，既克服了由集中參數(shù)搭建的衰減器的器件高頻一致性的問題，又減少了對(duì)空中的輻射，有效地減少了測試系統(tǒng)之間的信號(hào)干擾，節(jié)省了測試空間。本文還設(shè)計(jì)了有利于減少干擾的天線單元，得到了一套測試系統(tǒng)。該系統(tǒng)包括衰減單元、電路單元以及天線單元三個(gè)部分。文中詳細(xì)給出了各部分的設(shè)計(jì)原理和設(shè)計(jì)過程，最后將設(shè)計(jì)結(jié)果制作出相應(yīng)的實(shí)物樣品進(jìn)行測試。實(shí)測結(jié)果表明：該系統(tǒng)可以實(shí)現(xiàn)現(xiàn)場測試功能，具有良好的一致性和穩(wěn)定性，并可保證測試系統(tǒng)之間干擾減少，提高了空間利用率。本文的工作為無線鍵盤現(xiàn)場測試系統(tǒng)的設(shè)計(jì)改造提供了幫助。本文分為五個(gè)部分。 首先，闡述了無線鍵盤現(xiàn)場測試系統(tǒng)的研究現(xiàn)狀，，介紹了設(shè)計(jì)中用到的電磁仿真軟件。并提出無線鍵盤現(xiàn)場測試系統(tǒng)的整體構(gòu)建的方法。 其次，分析并研究了應(yīng)用于無線鍵盤現(xiàn)場測試系統(tǒng)的三端口衰減器設(shè)計(jì)。應(yīng)用耦合器的工作原理，設(shè)計(jì)了在工作頻段內(nèi)，微帶線和帶狀線兩類衰減量約30dB的衰減器。制作這幾款衰減器的實(shí)物并進(jìn)行測量，對(duì)設(shè)計(jì)進(jìn)行了驗(yàn)證。其中一款巧妙利用PCB基材的損耗，省去了負(fù)載電阻，有效地減小了輻射干擾。 然后，對(duì)系統(tǒng)中用于收發(fā)信號(hào)的天線進(jìn)行了設(shè)計(jì)，本文設(shè)計(jì)了單極子和八木兩款簡單的印刷天線，設(shè)計(jì)簡單，加工制作方便。通過仿真，進(jìn)行相應(yīng)參數(shù)的驗(yàn)證。 隨后，基于以上的幾項(xiàng)工作，將無線鍵盤現(xiàn)場測試系統(tǒng)制作出實(shí)物，通過頻譜儀進(jìn)行指定頻點(diǎn)的實(shí)物測試。測試結(jié)果表明該系統(tǒng)能夠在2.4GHz頻段內(nèi)對(duì)周圍的測試場的干擾很小，節(jié)省了測試空間，測試板一致性高，滿足了量產(chǎn)測試工作環(huán)境的要求。 最后，總結(jié)了本文的工作，并對(duì)未來相關(guān)研究工作做了展望。
[Abstract]:In recent years, with the rapid development of wireless communication technology, wireless keyboard products are rapidly introduced and updated, the demand is increasing. In order to ensure its quality, it is necessary to produce a suitable mass production test system. The test template of conventional field test system is composed of discrete components, which has poor consistency and controllability in high frequency, which leads to the increase of uncertainty. At the same time, the plane layout of the test template will interfere with the external, resulting in excessive occupation of test space. Aiming at the above two problems, this paper designs a wireless keyboard field test system. The self-designed three-port attenuator is used in the test template of the system. Based on the coupler as the attenuator, the attenuator skillfully utilizes the loss characteristic of PCB to make the excess signal energy consume between boards. It not only overcomes the problem of high frequency consistency of the attenuator built by concentrated parameters, but also reduces the radiation in the air, effectively reduces the signal interference between the test systems, and saves the test space. The antenna unit is designed to reduce interference, and a set of test system is obtained. The system includes three parts: attenuation unit, circuit unit and antenna unit. The design principle and process of each part are given in detail. The measured results show that the system can realize the field test function, has good consistency and stability, and can ensure the reduction of interference between the test systems and improve the space utilization ratio. The work of this paper has provided the help for the design and transformation of the wireless keyboard field test system. This paper is divided into five parts. Firstly, the research status of wireless keyboard field test system is described, and the electromagnetic simulation software used in the design is introduced. And put forward the whole construction method of wireless keyboard field test system. Secondly, the design of three-port attenuator used in wireless keyboard field test system is analyzed and studied. Based on the principle of coupler, a 30dB attenuator with two kinds of attenuation quantities, microstrip line and strip line, is designed in the working frequency band. The object of these attenuators is made and measured, and the design is verified. One of them cleverly utilizes the loss of PCB substrate to eliminate the load resistance and effectively reduce the radiation interference. Then, the antenna used to send and receive signals in the system is designed. Two simple printed antennas, monopole and Yagi, are designed in this paper. Through simulation, the corresponding parameters are verified. Then, based on the above work, the field test system of wireless keyboard is made into physical object, and the physical test of specified frequency point is carried out by spectrometer. The test results show that the system can interfere little to the surrounding test field in the 2.4GHz band, save the test space, have high consistency of test board, and meet the requirements of mass production test environment. Finally, the work of this paper is summarized, and the future research work is prospected.
【學(xué)位授予單位】：蘇州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP334.23;TN92

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本文編號(hào)：2309936