实用天线工程技术 倶新德、赵玉军【正版】

实用天线工程技术 倶新德、赵玉军【正版】
实用天线工程技术 倶新德、赵玉军【正版】
实用天线工程技术 倶新德、赵玉军【正版】
实用天线工程技术 倶新德、赵玉军【正版】

实用天线工程技术 倶新德、赵玉军【正版】

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实用天线工程技术 倶新德、赵玉军【正版】

实用天线工程技术 倶新德、赵玉军【正版】

$105.54

Product Details

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编辑推荐
《实用天线工程技术》共0章,重点介绍天线的物理概念,设计图表、曲线,天线的具体结构和尺寸,主要电性能。书中天线的种类和实例繁多,内容极为丰富且新颖,对常规天线都赋予了许多新内容,许多章节(如赋形波束天线、基站天线、同轴缝隙天线阵等)都是与读者见面。该书既是一本专著,又具有科普性,可读性和可劋作性特别强。《实用天线工程技术》特别适合从事天线设计、生产、使用和维修的广大工程技术人员参考,也适合从事无线电传输、移动通信的相关人员阅读,还可以作为天线电磁场专业和无线通信专业大专院校师生的参考书。 
目  录
第章基站天线
.移动通信和移动通信天线的相关知识
..移动通信及通信天线的发展概况及方向
..2基站天线的相关技术
.2单极化基站天线
.2.用线形λ0/2长偶极子构成的基站天线阵
.2.2用贴片天线构成的基站天线
.2.3高F/B比基站天线
.2.4利用三角波导上的横向缝隙实现基站天线的20°扇区波束
.2.5由近耦合渐变缝隙构成的六扇区天线
.3宽带单极化基站天线
.3.由有调谐支节的U形辐射单元构成的宽带基站天线
.3.2由不等间距线阵构成的宽带基站天线
.3.3由开缝贴片构成的宽带单极化基站天线
商品详情

 基本详情信息

 书名:实用天线工程技术

 ISBN:9787560633879

 定价:80.00

 作者:倶新德、赵玉军

 出版社:西安电子科技大学出版社

 出版时间:2015-04

 其他信息

 纸张:胶版纸

 页数:611

 尺寸:16开

 版次:1

 正文语种:简体中文...

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges USD 4.99. Standard International Shipping from United Kingdom, Germany and Japan to the United States charges 14.99. 

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. The average transit time is 3-7 business days. 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs: Customers are responsible for return shipping costs.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Defective Products: Return labels are provided for defective items.

  • Non-Defective Returns: Customers are responsible for obtaining their return shipping label.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 636-312-5925

  • Email: cs@everymarket.com

 

mx当当栏目.jpg

编辑推荐
《实用天线工程技术》共0章,重点介绍天线的物理概念,设计图表、曲线,天线的具体结构和尺寸,主要电性能。书中天线的种类和实例繁多,内容极为丰富且新颖,对常规天线都赋予了许多新内容,许多章节(如赋形波束天线、基站天线、同轴缝隙天线阵等)都是与读者见面。该书既是一本专著,又具有科普性,可读性和可劋作性特别强。《实用天线工程技术》特别适合从事天线设计、生产、使用和维修的广大工程技术人员参考,也适合从事无线电传输、移动通信的相关人员阅读,还可以作为天线电磁场专业和无线通信专业大专院校师生的参考书。 
目  录
第章基站天线
.移动通信和移动通信天线的相关知识
..移动通信及通信天线的发展概况及方向
..2基站天线的相关技术
.2单极化基站天线
.2.用线形λ0/2长偶极子构成的基站天线阵
.2.2用贴片天线构成的基站天线
.2.3高F/B比基站天线
.2.4利用三角波导上的横向缝隙实现基站天线的20°扇区波束
.2.5由近耦合渐变缝隙构成的六扇区天线
.3宽带单极化基站天线
.3.由有调谐支节的U形辐射单元构成的宽带基站天线
.3.2由不等间距线阵构成的宽带基站天线
.3.3由开缝贴片构成的宽带单极化基站天线
商品详情

 基本详情信息

 书名:实用天线工程技术

 ISBN:9787560633879

 定价:80.00

 作者:倶新德、赵玉军

 出版社:西安电子科技大学出版社

 出版时间:2015-04

 其他信息

 纸张:胶版纸

 页数:611

 尺寸:16开

 版次:1

 正文语种:简体中文...

Shipping Overview: 

Shipping: Standard Domestic Shipping within the United States charges USD 4.99. Standard International Shipping from United Kingdom, Germany and Japan to the United States charges 14.99. 

Order Processing: Please allow 1-2 business days for order processing and preparation before shipment. 

Domestic Shipping: Orders within the U.S. are shipped via USPS or FedEx, depending on the origin of the product. The average transit time is 3-7 business days. 

International Shipping: Currently, we only ship within the USA. 

Tracking Information: Every order is trackable. You will receive a tracking number once your order has been shipped. Products may be shipped from various global fulfillment centers.

Shipping Delays: 

Please note that shipping times may vary due to factors beyond our control, such as weather conditions, natural disasters, or peak holiday periods. While we strive to ensure timely delivery, the exact arrival time cannot be guaranteed and is managed by the shipping carrier.

Shipping Options:

  • Standard Delivery: Most orders are shipped within 3-7 business days. Larger items may utilize LTL shipping for safe handling.

  • Handling Time: We handle shipments on business days (Monday - Friday), with a preparation time of 1-2 days.

  • Additional Charges: Some items require additional shipping charges due to their size, weight, or special handling. These charges are specified on the product pages and are not eligible for shipping discounts.

  • Exclusions: Gift cards, packaging, taxes, and prior purchases do not count toward the minimum purchase requirement for free shipping. This offer is valid only for shipments to U.S. addresses, including Puerto Rico.

Delivery Details:

  • Estimates: Standard shipping within the US typically takes 3-7 business days. These are estimates and not guarantees.

  • Shipping Restrictions: We ship to all 50 states, Washington, DC, U.S. territories, and APO/FPO/DPO addresses. Shipping options vary based on the delivery address.

  • Remote Areas: Shipments to remote areas may incur additional charges or require pickup from a nearby shipping partner’s location.

Shipping Confirmation:

You will receive a shipping confirmation email with a tracking number as soon as your order is dispatched. If you do not receive this email immediately, please be assured that your items will arrive within the estimated delivery window provided at checkout.

Order Modifications:

If you need to cancel or modify your order, please contact our customer support immediately.

Issues with Delivery:

If your order shows as delivered but you have not received it, please contact the shipping carrier directly to resolve the issue. For persistent problems, contact our customer service at cs@everymarket.com.

Customer Support:

Our team is available 24/7 to assist you with any questions or concerns regarding your order. We are committed to ensuring a smooth shopping experience.

Return & Refund Policy Overview

Please review our return and refund policies below to ensure a smooth transaction process.

Return Policy

  • Duration: You have 30 days from receiving your item to initiate a return.

  • Condition: Items must be unworn, unwashed, with original tags and packaging intact.

  • Shipping Costs: Customers are responsible for return shipping costs.

  • Packaging: Ensure returned items are well-packaged to avoid damage during transit.

  • Tracking: Use a trackable and insured shipping method as we are not liable for items lost or damaged on return.

  • Initiating a Return: Contact us at cs@everymarket.com to start your return. We will provide a return shipping label and instructions upon approval. Returns without prior approval will not be accepted.

How to Return

  • Method: Returns must be sent back by mail to the address provided in the return instructions.

Return Label

  • Defective Products: Return labels are provided for defective items.

  • Non-Defective Returns: Customers are responsible for obtaining their return shipping label.

Product Conditions for Return

  • Eligible Products: Returns are only accepted for items in new condition.

Nonreturnable Items

Certain items are not eligible for return:

  • Electronic devices after 30 days (e.g., computers, laptops, Kindles)

  • Gift cards, prepaid game cards

  • Perishable goods, live insects, some jewelry, some health and personal care items

  • Customized or personalized products

  • Items with special shipping restrictions

Refund Policy

  • Window: Eligible products may be returned within 30 days of delivery for a refund.

  • Refund Method: Refunds are processed to the original payment method or as store credit for items purchased with gift cards.

  • Processing Time: Refunds are processed within 3-5 business days after we receive the return; please allow additional time for shipping and bank processing.

Claims

Inspect your order upon arrival and report any defects, damages, or incorrect items immediately to allow us to address the issue. For claims, contact our support team with details of the issue.

Exchange Policy

For the quickest service, return your original item and place a new order for the desired product once your return is accepted.

Return Address

EveryMarket Customer Service 2101 E Terra Ln, O'Fallon, MO 63366

Customer Support

Available 24/7 for any questions or assistance needed:

  • Phone: +1 636-312-5925

  • Email: cs@everymarket.com

 

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