JP2022521849A - 低誘電率、低損失レドーム - Google Patents
低誘電率、低損失レドーム Download PDFInfo
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- JP2022521849A JP2022521849A JP2021559053A JP2021559053A JP2022521849A JP 2022521849 A JP2022521849 A JP 2022521849A JP 2021559053 A JP2021559053 A JP 2021559053A JP 2021559053 A JP2021559053 A JP 2021559053A JP 2022521849 A JP2022521849 A JP 2022521849A
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- radome
- ghz
- relative permittivity
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- frequencies
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/706—Anisotropic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/738—Thermoformability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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Abstract
Description
レドームは、アンテナ用の電磁透過性の環境保護エンクロージャである。レドームの設計は通常、屋外環境の構造的要求を満たし、かつ電磁エネルギーの損失を最小限に抑える必要がある。
詳細な説明
次に、例示的な実施形態を、添付の図面を参照してより十分に説明する。
例示的な実施形態では、第1及び第2の層304、308はそれぞれ、約0.25ミリメートル(mm)~約0.5mm(例えば、0.25mm、0.38mm、0.43mm、0.5mmなど)の範囲内の層厚を有し得る。他の例示的な実施形態では、第1及び第2の層304、308のいずれか一方又は両方は、0.25mm未満又は0.5mmを超えるなどの厚さを有し得る。例示的な実施形態では、第1及び第2の層304、308は、それぞれ、ほぼ同じ厚さを有し得る。他の例示的な実施形態では、第1及び第2の層304、308は、互いに異なる厚さを有し得る。
・ミリ波周波数及び/又は比較的高い周波数での全体的な低比誘電率及び全体的な低損失正接又は誘電正接(Df);及び/又は
・電磁エネルギー損失を最小限に抑え又は少なくとも低下させる比較的強力なコア構造(例えば、熱硬化性複合材料又はミクロスフェアを含むエポキシ(例えば、中空ガラスミクロスフェア、中空プラスチックミクロスフェア、中空セラミックミクロスフェア、マイクロバルーン、又は気泡など)、熱可塑性ハニカム構造など);及び/又は
・環境保護を提供し、高い衝撃に耐えることができる外側部分(例えば、外側の表面、スキンなど);及び/又は
・比較的低いコスト;及び/又は
・圧縮成形プロセスを使用して、複雑な形状のレドームを作製できるようにすること;及び/又は
・難燃性(例えば、UL94燃焼性認証など);及び/又は
・屋外での使用に適していること(例えば、UL756C Fl紫外線(UV)及び水浸認証など);及び/又は
・長期の周囲熱への適合性(例えば、UL746B RTI認証など)。
Claims (41)
- 低誘電率、低損失のレドームであって、硬化前に熱成形可能かつ/又はレドームの厚さを通して2.5未満の実質的に均一な低比誘電率を有する、均質かつ/又は統合された構造を有するように母材内に取り込まれた繊維及びミクロスフェアを含む、レドーム。
- 前記繊維は、難燃性メタアラミド材料、オープンウィーブポリマーファブリック、高密度ポリエチレン、超高分子量ポリエチレン、低比誘電率を有する高密度プラスチック繊維、及び/又は高密度ポリエチレン繊維のうちの1つ以上を含み、
前記ミクロスフェアは、中空ガラスミクロスフェア、中空プラスチックミクロスフェア、及び/又は中空セラミックミクロスフェアのうちの1つ以上を含み、
前記母材は熱硬化性又は熱可塑性母材を含む、請求項1に記載のレドーム。 - 前記繊維は補強及び機械的強度を提供するように構成されており、
前記ミクロスフェアは全体的な比誘電率を低下させるように構成されている、請求項1に記載のレドーム。 - レドームが、コアの両側に配置されて3層積層Aサンドイッチ構造を画定する外側及び内側のスキン層を有しないように、前記繊維及びミクロスフェアは前記母材内に取り込まれている、請求項1に記載のレドーム。
- レドームは、ミリ波5G周波数及び/又は約20GHz~約90GHz及び/又は約20GHz~約50GHz及び/又は約24GHz~約40GHzの周波数で少なくとも約2.6キロボルト/ミリメートルの絶縁耐力、約2以下の比誘電率、及び/又は約0.02以下の低損失正接又は誘電正接(Df)を有するように構成されている、請求項1に記載のレドーム。
- レドームは、
約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成されている、請求項1~5のいずれか一項に記載のレドーム。 - レドームがUL94火炎定格を有するように、レドームの少なくとも一部に適用及び/又は取り込まれた難燃剤をさらに含む、請求項1~5のいずれか一項に記載のレドーム。
- レドームが異方性であるように構成され、及び/又は水平偏光と垂直偏光との間の交差偏光の差を低減するように構成されている、請求項1~5のいずれか一項に記載のレドーム。
- 前記繊維及びミクロスフェアが前記母材内にカレンダー加工されることにより、硬化前に熱成形可能なカレンダー加工されたワンピース構造が提供される、請求項1~5のいずれか一項に記載のレドーム。
- 低誘電率、低損失のレドームであって、第1及び第2の熱可塑性層と、前記第1及び第2の熱可塑性層の間の熱可塑性コアとを含むことにより、熱成形可能であるレドーム。
- 複雑かつ/又は湾曲した形状に熱成形可能である、請求項10に記載のレドーム。
- 前記第1及び第2の熱可塑性層は、それぞれ、約2.8以下の比誘電率を有する、請求項10に記載のレドーム。
- 前記熱可塑性コアは熱可塑性フォーム又は熱可塑性ハニカムを含み、
前記第1及び第2の熱可塑性層は熱可塑性樹脂材料を含む、請求項10に記載のレドーム。 - 前記第1及び第2の熱可塑性層は、難燃性メタアラミド材料、オープンウィーブポリマーファブリック、高密度ポリエチレン、超高分子量ポリエチレン、低比誘電率を有する高密度プラスチック繊維、及び/又は高密度ポリエチレン繊維のうちの1つ以上を含む繊維を前記熱可塑性樹脂材料中に含む、請求項13に記載のレドーム。
- ミリ波5G周波数及び/又は約20GHz~約90GHz及び/又は約20GHz~約50GHz及び/又は約24GHz~約40GHzの周波数で少なくとも約4キロボルト/ミリメートルの絶縁耐力、約2以下の全体的な比誘電率、及び/又は約0.01以下の全体的な低損失正接又は誘電正接(Df)を有するように構成されている、請求項10に記載のレドーム。
- 約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成されている、請求項10~15のいずれか一項に記載のレドーム。 - レドームがUL94火炎定格を有するように、レドームの少なくとも一部に適用及び/又は取り込まれた難燃剤をさらに含む、請求項10~15のいずれか一項に記載のレドーム。
- レドームが異方性であるように構成され、及び/又は水平偏光と垂直偏光との間の交差偏光の差を低減するように構成されている、請求項10~15のいずれか一項に記載のレドーム。
- 第1及び第2の層と、前記第1及び第2の層の間のコアとを含む低誘電率、低損失のレドームであって、前記第1及び第2の層は母材内に繊維及びミクロスフェアを含む、レドーム。
- 前記繊維は、難燃性メタアラミド材料、オープンウィーブポリマーファブリック、高密度ポリエチレン、超高分子量ポリエチレン、低比誘電率を有する高密度プラスチック繊維、及び/又は高密度ポリエチレン繊維のうちの1つ以上を含み、
前記ミクロスフェアは、中空ガラスミクロスフェア、中空プラスチックミクロスフェア、及び/又は中空セラミックミクロスフェアのうちの1つ以上を含み、
前記母材は熱硬化性又は熱可塑性母材を含む、請求項19に記載のレドーム。 - 前記繊維は補強及び機械的強度のために前記第1及び第2の層内に取り込まれており、
前記ミクロスフェアは全体的な比誘電率を低下させるために前記第1及び第2の層内に取り込まれている、請求項19に記載のレドーム。 - 前記第1及び第2の層は、それぞれ約2.2~約3.6の範囲内の比誘電率を有し、前記コアは:
熱硬化性母材内の、約1.7以下の比誘電率を有するミクロスフェア;又は
約1.03以下の比誘電率を有する熱可塑性ハニカムコア
を含む、請求項19に記載のレドーム。 - ミリ波5G周波数及び/又は約20GHz~約90GHz及び/又は約20GHz~約50GHz及び/又は約24GHz~約40GHzの周波数で少なくとも約3.56キロボルト/ミリメートルの絶縁耐力、約2以下の全体的な比誘電率、及び/又は約0.05以下の全体的な低損失正接又は誘電正接(Df)を有するように構成されている、請求項19に記載のレドーム。
- 約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成されている、請求項19~23のいずれか一項に記載のレドーム。 - 前記コアは、レドームが熱成形及び硬化されるように熱硬化性コアを含むか、又は
前記コアは、レドームが熱成形可能であるように熱可塑性フォームコアを含む、請求項19~23のいずれか一項に記載のレドーム。 - レドームがUL94火炎定格を有するように、レドームの少なくとも一部に適用及び/又は取り込まれた難燃剤をさらに含む、請求項19~23のいずれか一項に記載のレドーム。
- レドームが異方性であるように構成され、及び/又は水平偏光と垂直偏光との間の交差偏光の差を低減するように構成されている、請求項19~23のいずれか一項に記載のレドーム。
- 3次元で形成又は成形され、完全に硬化するように構成された部分的に硬化させたBステージ材料;及び/又は
ファブリック及び/又は繊維が埋め込まれたBステージエポキシ樹脂を含む、請求項19~23のいずれか一項に記載のレドーム。 - 射出成形された低誘電率、低損失のレドームであって、
前記レドームは、射出成形可能な樹脂母材内に繊維及び/又はミクロスフェアを含み、かつ/又は
前記レドームは、ミリ波5G周波数及び/又は約20GHz~約90GHz及び/又は約20GHz~約50GHz及び/又は約24GHz~約40GHzの周波数で約1.5~約2.5の範囲内の全体的な比誘電率、及び約0.01未満の全体的な低損失正接又は誘電正接(Df)を有するように構成されている、レドーム。 - 前記射出成形可能な樹脂は、ポリプロピレン(PP)及び/又はポリカルボナート/ポリブチレンテレフタラート(PC/PBT)ブレンドを含み、かつ/又は
前記繊維は、高密度ポリエチレン、超高分子量ポリエチレン、低比誘電率を有する高密度プラスチック繊維、及び/又は高密度ポリプロピレン繊維のうちの1つ以上を含み、かつ/又は
前記ミクロスフェアは、中空ガラスミクロスフェア、中空プラスチックミクロスフェア、及び/又は中空セラミックミクロスフェアのうちの1つ以上を含む、請求項29に記載のレドーム。 - 約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成されている、請求項29又は30に記載のレドーム。 - レドームがUL94火炎定格を有するように、レドームの少なくとも一部に適用及び/又は取り込まれた難燃剤をさらに含む、請求項29又は30に記載のレドーム。
- 約2.5以下の比誘電率を有する低誘電率、低損失のレドームを作製する方法であって、繊維及びミクロスフェアを母材に取り込ませることにより、均質かつ/又は統合された構造を有するレドームに、レドームの厚さを通して実質的に均一な低比誘電率を提供することを含む方法。
- 前記繊維及び前記ミクロスフェアを前記母材に取り込ませることは、前記繊維及び前記ミクロスフェアを前記母材にカレンダー加工することを含み、それにより、硬化前に熱成形可能なカレンダー加工されたワンピース構造を提供する、請求項33に記載の方法。
- 前記レドームは、
約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成される、請求項33又は34に記載の方法。 - 約2.5以下の比誘電率を有する低誘電率、低損失のレドームを作製する方法であって、第1及び第2の熱可塑性層の間の熱可塑性コアを熱成形することにより、熱成形レドームを提供することを含む方法。
- 前記方法は、第1及び第2の熱可塑性層の間の熱可塑性コアを熱成形することにより、複雑な及び/又は湾曲した形状を有する熱成形レドームを提供することを含み、
前記熱可塑性コアは熱可塑性フォーム又は熱可塑性ハニカムを含み、
前記第1及び第2の熱可塑性層は熱可塑性樹脂材料を含む、請求項36に記載の方法。 - 前記レドームは、
約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成される、請求項36又は37に記載の方法。 - 約2.5以下の比誘電率を有する低誘電率、低損失のレドームを作製する方法であって、ミクロスフェア及び/又は繊維を含む熱可塑性樹脂を含む複合材料を射出成形することにより、射出成形レドームを提供することを含む方法。
- 前記熱可塑性樹脂は、ポリプロピレン(PP)及び/又はポリカルボナート/ポリブチレンテレフタラート(PC/PBT)ブレンドを含む、請求項39に記載の方法。
- 前記レドームは、
約20GHz~約90GHzの周波数で約2以下の比誘電率;及び/又は
約20GHz~約50GHzの周波数で約1.85以下の比誘電率;及び/又は
約24GHz~約40GHzの周波数で約1.7以下の比誘電率
を有するように構成される、請求項39又は40に記載の方法。
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WO2022132297A1 (en) * | 2020-12-14 | 2022-06-23 | Laird Technologies, Inc. | Low dielectric, low loss radomes and materials for low dielectric, low loss radomes |
CN111786102A (zh) | 2019-04-03 | 2020-10-16 | 莱尔德电子材料(深圳)有限公司 | 低介电、低损耗天线罩 |
CN112646344A (zh) * | 2020-12-23 | 2021-04-13 | 郑州圣莱特空心微珠新材料有限公司 | 制备天线罩的材料及其制备方法 |
EP4140728A1 (en) * | 2021-08-26 | 2023-03-01 | Covestro Deutschland AG | A multilayer composite sheet for antenna housing |
WO2023055597A1 (en) * | 2021-09-29 | 2023-04-06 | Laird Technologies, Inc. | Low dielectric, low loss radomes, materials and methods for making low dielectric, low loss radomes |
TWM651069U (zh) * | 2021-09-29 | 2024-02-01 | 美商雷爾德科技有限公司 | 低介電、低損耗天線罩 |
WO2024088539A1 (en) * | 2022-10-27 | 2024-05-02 | Huawei Technologies Co., Ltd. | Housing for an antenna and antenna device |
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CN113906631A (zh) | 2022-01-07 |
KR102560418B1 (ko) | 2023-07-26 |
EP3949014A1 (en) | 2022-02-09 |
US20220029282A1 (en) | 2022-01-27 |
CN210182571U (zh) | 2020-03-24 |
TW202103373A (zh) | 2021-01-16 |
TWM607013U (zh) | 2021-02-01 |
US20240106111A1 (en) | 2024-03-28 |
WO2020205923A1 (en) | 2020-10-08 |
KR20210129260A (ko) | 2021-10-27 |
JP2023101584A (ja) | 2023-07-21 |
CN111786102A (zh) | 2020-10-16 |
TWI732510B (zh) | 2021-07-01 |
DE202020005705U1 (de) | 2022-03-11 |
EP3949014A4 (en) | 2022-06-01 |
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