基于噪声抵消技术的低功耗C频段差分低噪声放大器

设计了一款??基于噪声抵消技术的低功耗C频段的差分低噪声放大器。该放大器由输入级、放大级以及输出缓冲级3个模块构成,其中输入级采用电容交叉耦合的差分对与直接交叉耦合结构差分对级联,实现输入匹配及噪声抵消;放大级采用具有电阻-电感并联反馈的电流复用结构来获得高的增益、良好的增益平坦性及低的功耗;输出缓冲级采用源跟随器结构,实现良好的输出匹配。基于TSMC 0.18 μm CMOS工艺库,验证表明在C频段,放大器的增益为20.4??0.5 dB,噪声系数介于2.3~2.4 dB之间,输入和输出的回波损耗均优于-11 dB,稳定因子恒大于1,在6.5 GHz下,1 dB压缩点为-16.6 dBm,IIP3为-7 dBm,在2.5 V电压下,电路功耗仅为6.75 mW。     

靶场毫米波信号高灵敏度接收与测试新方法

基于靶场毫米波测试中微弱信号（低至-128 dBm）检测的实际需求,通过信噪比分析 ,采用外差式宽带多通道快速扫频复合信道化技术,在W频段实现了-128 dBm接收灵敏 度的测 试系统。同时,设计了毫米波信标源并利用空间衰减理论,提出了一种W频段高灵敏度（- 128 dBm）测试的新方法。理论分析表明,测试距离为290 m、相应的衰减值约为-1 21.5 dB时,可提供一个功率最小达到-128 dBm的W频段毫米波信号源。利用标定后的 毫米波信号源进行外场实际测量,证明了该测试方法的可行性。     

L频段高稳梳状谱电路设计与实现

利用阶跃恢复二极管的强非线性特点,设计了一个输入信号频率100 MHz、输出信号频率0 .9～1.4 GHz的梳状谱电路,经开关滤波器电路处理后可以实现6个单频点输出。梳状谱电 路经 优化设计和调试,以较低的驱动功率实现了模块高稳定输出。在-55℃～+85℃工作温度范围 内、输入信号功率0～+3 dBm条件下,梳状谱电路驱动功率为20 dBm左右,测试模块输出信 号功率变化小于1.5 dB,附加相位噪声劣化小于1 dB。     

新型三等分Wilkinson功分器在高效率功放中的应用

针对一种新型的三路Doherty功率放大器,为满足其对称结构要求,在传统对称结 构二等分功分器基础上,结合三路Doherty功放电路尺寸,通过理论计算和采用ADS软件仿真 的方法设计了对称结构三等分Wilkinson功分器。其尺寸为19 mm×11 mm,在2.11 ～2.17 GHz内,插入损耗小于0.4 dB,输出端口隔离度大于16 dB,端口回波 损耗大于13 dB。在适应三路Doherty功放对称结构的前提下,功分器性能指标满足功放 电路三路相位一致性设计要求,提高了放大器工作效率,测试结果显示饱和点工作效率高于 两路Doherty功率放大器。     

B3G射频接收机前端设计

分析了DC-OFDM零中频接收方案,采用两个相邻子载波以分路/合路的方式进行信号处理以降 低硬件难度和复杂度。利用ADS软件设计了B3G射频接收机,其低噪声放大器的最低噪声系数 为1.7 dB,三阶交调点为-1 dBm;下变频器在频带范围内其增益为12.5 dB, 1 dB压缩点-12 dBm,三阶交调点-3 dBm。实验 测试结果表明,所设计的前端满足接收机的指标要求,适合于宽带通信系统。     

新型Koch型缺陷地面结构低通滤波器设计

提出了一种新型Koch型缺陷地面结构（KDGS）,设计了两款基于分形缺陷地 面结构的低通滤波器。仿真结果表明：所设计的两种新型低通滤波器3 dB截止频率分别 为3.10 GHz和3.20 GHz,10 dB阻带带宽分别为8.75 GHz和12.25 GHz ,通带插入损耗均小于0.10 dB。该滤波器设计方法简单,性能好且成本低,在无线通 信中很有应用前景。     

一种回退效率增强宽带Doherty放大器的设计

提出给主功放分配多的功率来提高Doherty回退范围的功率转换效率。建立了数学模型，从理论上验证了回退范围的效率提高。电路测试证明，回退6 dB漏极效率大于59〖WT《Times New Roman》〗%〖WTBZ〗，高同类宽带Doherty 7个百分点，峰值输出功率46.5 dBm。另外，对类集总传输线的解析公式进行修正，校正了原来公式在理论计算中存在的32.5〖WT《Times New Roman》〗%〖WTBZ〗的误差确，缩短了设计时间，降低了设计难度。     

一种新型C频段高效率移相GaN功率放大器

研制了一种性能优良的全固态C频段高效率移相氮化镓（GaN）功率放大器模块。介绍了该功 放模块设计方案及工作原理,并给出了该功放模块技术参数实验测试结果。该模块 输出功率30 W,带宽10 MHz,带有6位移相功能,具有C频段高频率、固态、小型化 、高效率、高功率密度、高击穿电压特性,是一种目前国内外尚无类似集成设计的最新高 性能氮化镓（GaN）功率放大器模块。因其功放模块输出末级采用了美国Cree公司第三代宽 禁带GaN功放管优化设计,实现了固态C频段高效率功率输出。     

C波段立体微带电路GaAs FET功率放大器

利用一四一三所研制的微波功率砷化镓FET,研制了一种高增益的五级功率放大器,末级利用功率合成。在C波段,线性增益31dB,1dB增益压缩点输出功率为860mw。当输入信号为1mw时。中心频率输出为940mw,效率达10%左右。     

UHF大功率功放模块设计的新方法

针对OFDM信号对功放高峰值功率的要求,提出了工作在220～400 MHz的大功率功 放模块设计的新方法。该方法结合ADS软件仿真分析,按仿真模型用QFX86射频同轴电缆自制 了功率分配/合成网络,用该网络设计了一款输出峰值功率不小于300 W的功放模块。该 模块已成功应用于某电台中且工作良好。     

Rejoinder to Hunt’s ‘The bases of power approach to channel relationships’

Abstract

The critique of Blois and Hopkinson presented by Hunt is examined. Hunt argues that Blois and Hopkinson: make criticisms of the power-base approach in channels of distribution research; that these criticisms can be categorised under five headings; and, that each of these criticisms is suspect. This rejoinder examines each of Hunt’s claims and argues that they are not fully convincing.     

消防应急救援职能定位的法学思考

消防应急救援是《消防法》赋予公安消防队、专职消防队的一项法定职责。从法律规范的规定来看,消防应急救援既是政府应急救援的专业力量,也是政府应急救援的骨干力量;从法学理论的分析角度来看,消防应急救援还应当成为政府应急救援的主体力量。     

Power and responsibility: How different sources of CEO power affect firms' corporate social responsibility practices

Does greater CEO power come with more responsibility? Previous scholarly work in this field entails divergent results on this question. Based on the upper echelons theory and CEO power literature, this study aimed to explore the mechanisms underlying how different sources of CEO power, including structural, ownership, expert, and prestige power, affect firms’ corporate social responsibility (CSR) practices and whether such relationships are moderated by firm visibility. Using a panel dataset comprising 6604 yearly observations of Chinese publicly traded firms from 2009 to 2019, we found that structural power is negatively related to CSR practices and that expert power is positively related to CSR practices, whereas ownership power and prestige power have no direct relationship with CSR practices. Our results show that firm visibility weakens the negative relationship between structural power and CSR practices and strengthens the relationship between expert power and CSR practices, respectively. Overall, this study reconciles the mixed results of previous studies on the impact of CEO power on CSR and integrates the effect of firm visibility as a contextual factor. This article concludes with practical recommendations on how to manage CSR engagement.     

渠道权力结构的过度倾斜与权力失效——基于农产品营销渠道的研究

本文通过对中国农产品营销渠道的考察,发现了渠道权力结构的过度倾斜与权力的失效问题。作者认为,在渠道权力结构理论背后存在着一个隐含命题,即渠道关系双方的规模与实力应当是对等的,或者二者之间的反差在一个合理的区间内。在渠道关系中,如果一方是为数众多、分散且规模弱小的成员,而另一方是规模巨大、实力较强的成员时,就会出现权力结构的过度倾斜,而当渠道中权力弱势地位一方采取一致性的“反抗”行为时,权力优势成员的权力就会失效。     

The dynamics of networked power in a concentrated business network

The purpose of this paper is to investigate the dynamics of networked power in a concentrated business network. Power is a long standing theme in inter-organizational research, yet there is a paucity of studies about how power emerges and is constructed over time at the network level. The paper adopts process, systems and network theory to interpret a rich single case study from the food industry. Three power mechanisms are identified, gatekeeping, decoupling and resource allocation, which form the basis of a model of networked power dynamics. Empirically tracing the dynamics of networked power highlights the economic contents of interactions. The paper extends current understandings of power as ‘conflict and coercion’ to include influencing, leveraging and strategic maneuvering in the actual performance of networked power.     

零售商抗衡势力假说研究评述

文章以纵向市场结构为背景对零售商买方势力进行了较为清晰的界定,并依据买方势力的福利影响区分买方垄断势力和买方抗衡势力。然后从理论模型、经验研究和实验设计等方面,系统综述了零售商抗衡势力的测度方法及其对市场价格、市场绩效和社会福利影响的相关研究进展,以此对我国零售业实施相关的规制政策提供一定的理论指导和经验借鉴。     

Estimating Firm-Specific and Relational Properties in Interorganizational Relationships in Marketing

ABSTRACT

This research attempts to distinguish empirically between the potential influence of a manufacturer as compared to the influence of a manufacturer's salesperson over an industrial distributor. Given the existence of such a distinction, the scope of such influence is examined with regard to a distributor's business in eight different areas of potential influence: price, order quantity, product line, advertising and sales promotion, customer service, inventory, customer credit, and display. Data were collected from 412 industrial distributors in a marketing channel. The authors utilized regression analysis to distinguish between manufacturer and manufacturer salesperson power. Then, factor analysis was utilized to determine if the salesperson does have power over policy areas apart from that of the manufacturer. Research results suggest that the manufacturer's salesperson, compared with the manufacturer, possesses a different domain of power than does the manufacturer in a channel containing an industrial distributor.     

资本稀缺性与企业权力安排

分析已有的企业权力理论,认为传统的权力理论由于受到了资本至上的观点和现行法律规定的束缚,从而没有给出令人信服的解释,并在此基础上,确定对企业权力安排的看法,即组成企业的各要素的相对稀缺程度或替代程度是决定其拥有者在企业的权力安排的博弈中所处地位的决定因素。     

The Exercise and Acceptance of Power in an Industrial Channel Dyad

ABSTRACT

Purpose: Power is an adaptive process in which power exercised by one firm could be less than, equal to, or greater than that accepted by another over the course of different periods. This study incorporates previous research on power asymmetry to examine the process of power exercise and acceptance over three stages: power exploration, power balance and power idleness.

Design/methodology/approach: Semistructured interviews were conducted with 4 powerful suppliers (the source firms) and their distributors (the target firms) in different industries.

Findings: The exercise and acceptance of power are influenced by expected rewards and expected costs in the power exploration stage and are impacted by dependence and trust in the power idleness stage; in the stage of power balance, power exercise and acceptance will not be altered. Under power shortage, the source firm will attempt to use less power and/or to enhance the levels of power accepted by the target; under power surplus, the source firm will transform the surplus into company performance and/or personal interests.

Research limitations/implications: The findings deepen our understanding of how power is exercised and accepted in a channel dyad over time, and of how firms behave in dealing with power shortage and power surplus.

Practical implications: The findings also provide some guidance for practitioners, so that they may apply power more appropriately based on different power stages in marketing channels.

Originality/value: This study extends our knowledge on power evolution over three stages from both a power holder and an acceptor viewpoint.     

论公共住宅金融的经济基础

住宅供给包括优质住宅供给和普通住宅供给,优质住宅供给刚性强,普通住宅供给弹性大。普通住宅成本最低,也是住宅保障的主要依靠对象。公共住宅金融源于消费者市场支付能力的不足,但囿于公共住宅金融的价值属性,公共住宅金融并不能弥补消费者支付能力的永久不足,只能弥补消费者支付能力的暂时不足。公共住宅金融只有将劳动力价值作为自己发展的经济基础,才能确保公共住宅金融的稳健运行,才能突破西方公共住宅金融的历史局限性。